Forestry Lubricants Market Size, Share, Growth, and Industry Analysis, By Type (Synthetic, Synthetic Blend Oil (SBO), Bio Based, Mineral), By Application (Sawmills, Paper & Paperboard Mills, Wood Products Manufacturing, Harvesting/Logging, Biomass Pellet Mills, Pulp Mills, Others), Regional Insights and Forecast to 2035
Forestry Lubricants Market Overview
The global Forestry Lubricants Market size estimated at USD 4432.66 million in 2026 and is projected to reach USD 5494 million by 2035, growing at a CAGR of 2.42% from 2026 to 2035.
The Forestry Lubricants Market plays a critical role in supporting mechanized forestry operations, including harvesting, logging, wood processing, and biomass production. Forestry lubricants are specifically engineered to withstand heavy loads, extreme temperatures, and continuous operation cycles experienced by chainsaws, harvesters, forwarders, skidders, and feller bunchers. More than 70% of commercial forestry equipment worldwide operates under high-pressure conditions exceeding 250 bar, creating significant demand for advanced lubrication solutions. Bio-based forestry lubricants have gained traction, accounting for approximately 28% of lubricant consumption in environmentally sensitive forestry zones. Over 1.8 billion hectares of managed forest land globally require mechanized equipment support, increasing the importance of specialized chain oils, hydraulic fluids, gear oils, and greases. Forestry lubricants contribute to equipment efficiency by reducing wear rates by up to 35% and extending maintenance intervals beyond 500 operating hours in many forestry applications.
Growing environmental regulations continue to reshape the Forestry Lubricants Market. More than 45 countries have implemented restrictions on lubricant leakage in forest ecosystems, encouraging adoption of biodegradable products with degradation rates exceeding 90% within 28 days. Biomass harvesting operations represent a significant demand center, with global wood pellet production surpassing 51 million metric tons annually. Forestry contractors increasingly prioritize lubricants that reduce equipment downtime, with maintenance costs representing nearly 18% of total machine operating expenses. Continuous advancements in additive technologies, wear protection formulations, and renewable feedstocks are strengthening market penetration across harvesting fleets exceeding 5 million forestry machines operating globally.
The United States remains one of the largest consumers of forestry lubricants due to its extensive commercial forestry sector covering approximately 310 million hectares of forest land. More than 10 million hectares undergo active timber management annually, supporting substantial demand for hydraulic oils, chain lubricants, and heavy-duty greases. The country produces over 350 million cubic meters of industrial roundwood each year, creating significant equipment utilization rates. Around 62% of large-scale forestry contractors utilize synthetic or synthetic-blend lubricants to improve machinery performance. Forestry machinery operating in regions such as Oregon, Washington, Georgia, and Alabama often exceeds 2,000 annual operating hours, increasing lubricant replacement frequency and consumption volumes.
The U.S. forestry lubricant market is also influenced by sustainability initiatives and environmental regulations. Approximately 31% of forestry equipment operators have adopted biodegradable lubricants for operations near water bodies and protected ecosystems. More than 950 biomass facilities and wood-processing plants contribute to continuous lubricant demand across harvesting and transportation equipment. Advanced forestry harvesters commonly operate with hydraulic systems exceeding 300 bar pressure, requiring premium lubrication technologies. Equipment downtime can reduce productivity by nearly 12%, making lubricant quality a critical operational factor. Increasing investments in mechanized logging fleets and precision forestry technologies continue to strengthen long-term lubricant consumption throughout the United States forestry value chain.
Key Findings
- Key Market Driver: Biodegradable lubricant adoption reached 28% while sustainability compliance increased across forestry operations globally.
- Major Market Restraint: Conventional lubricant disposal costs increased 19% affecting procurement decisions among forestry operators.
- Emerging Trends: Bio-based formulations achieved 31% penetration driven by environmental performance requirements worldwide.
- Regional Leadership: North America maintained 34% share supported by extensive mechanized forestry equipment deployment.
- Competitive Landscape: Top manufacturers controlled 46% market share through diversified lubricant portfolios globally.
- Market Segmentation: Synthetic lubricant products captured 41% share due to superior equipment protection.
- Recent Development: Advanced biodegradable chain oils improved performance efficiency by 22% during forestry applications.
Forestry Lubricants Market Latest Trends
Environmental sustainability remains the dominant trend in the Forestry Lubricants Market. Biodegradable lubricants now represent approximately 28% of total forestry lubricant usage, compared with 19% five years earlier. Forestry contractors increasingly select products achieving more than 90% biodegradation within 28 days. Synthetic ester-based lubricants have gained significant traction because they deliver operational stability at temperatures reaching 150°C while maintaining fluidity below -35°C. More than 40% of newly purchased forestry harvesters are configured for environmentally acceptable lubricants. Equipment manufacturers increasingly recommend low-toxicity hydraulic oils to reduce ecological impact across protected forest zones covering over 650 million hectares worldwide.
Digital monitoring and predictive maintenance technologies are also transforming lubricant management practices. Approximately 37% of large forestry fleets utilize oil condition monitoring systems that track contamination, oxidation, and viscosity changes. Advanced lubricant formulations can extend oil drain intervals beyond 600 operating hours, reducing maintenance interruptions. Nanotechnology-based additives have demonstrated wear reduction rates of nearly 18% in heavy-duty forestry applications. Biomass harvesting equipment utilization has increased by 24% during the last several years, generating additional demand for high-performance lubricants. The integration of telematics, automated harvesting systems, and smart maintenance platforms continues to support premium lubricant adoption throughout commercial forestry operations.
Forestry Lubricants Market Dynamics
DRIVER
"Rising mechanization of forestry operations."
Mechanized forestry activities continue to expand globally, creating substantial demand for specialized forestry lubricants. More than 65% of commercial timber harvesting operations now utilize advanced machinery such as harvesters, skidders, and forwarders. Modern forestry harvesters process over 600 trees per shift, requiring continuous lubrication under severe operating conditions. Equipment utilization frequently exceeds 2,000 hours annually, increasing lubricant consumption across hydraulic systems, chains, gears, and bearings. Forestry machinery maintenance costs account for nearly 18% of operational expenditure, encouraging adoption of premium lubricants that reduce wear by approximately 35%. Global industrial roundwood production exceeds 2 billion cubic meters annually, generating continuous equipment activity. Expanding biomass harvesting operations and precision forestry technologies further strengthen lubricant demand throughout commercial forestry value chains worldwide.
RESTRAINT
"Stringent environmental compliance requirements."
Environmental regulations governing lubricant usage and disposal present challenges for market participants. More than 45 countries have implemented restrictions regarding lubricant leakage in forestry environments. Conventional petroleum-based products face increasing scrutiny because a single liter of leaked lubricant can contaminate large volumes of surrounding soil and water. Forestry contractors operating near protected ecosystems must frequently transition to biodegradable alternatives that satisfy strict environmental standards. Compliance testing, certification procedures, and specialized formulation requirements increase production complexity. Approximately 26% of small forestry operators report difficulties associated with higher procurement costs for environmentally acceptable lubricants. Regulatory variations across regions also create additional product adaptation requirements, limiting standardization and increasing operational burdens for manufacturers and distributors.
OPPORTUNITY
"Growth in bio-based lubricant technologies."
Bio-based forestry lubricants represent one of the strongest opportunities within the market. Renewable feedstocks derived from vegetable oils and synthetic esters have demonstrated biodegradation rates exceeding 90% under standardized testing conditions. Approximately 31% of forestry operators now evaluate sustainability performance as a primary purchasing factor. Government-supported environmental programs across Europe and North America encourage adoption of low-toxicity lubricants. Research investments have improved oxidation stability by nearly 20% compared with earlier bio-based formulations. More than 650 million hectares of environmentally sensitive forest areas create favorable conditions for biodegradable product deployment. Increasing demand for sustainable forestry certification and responsible harvesting practices continues to expand the addressable market for advanced renewable lubricant technologies globally.
CHALLENGE
"Rising costs and performance expectations."
Manufacturers face challenges balancing performance requirements with cost competitiveness. Premium synthetic and biodegradable lubricants often require specialized additives and advanced base stocks that increase production expenses. Customers increasingly expect longer drain intervals exceeding 600 hours while maintaining wear protection and environmental compliance. Raw material price volatility affects supply stability for synthetic esters and specialty additives. Approximately 22% of forestry contractors prioritize procurement costs over long-term performance benefits, creating pricing pressure. Maintaining product quality, environmental standards, and operational efficiency simultaneously remains a significant challenge for lubricant suppliers worldwide.
Forestry Lubricants Market Segmentation
Forestry lubricants are segmented by type and application according to equipment requirements and operational environments. Synthetic and synthetic blend products dominate high-performance machinery, while bio-based lubricants expand in environmentally sensitive regions. Applications include harvesting, sawmills, pulp mills, paper production, biomass facilities, and wood manufacturing operations, each requiring specialized lubrication characteristics.
BY TYPE
Synthetic: Synthetic forestry lubricants account for approximately 41% of market share due to superior thermal stability and wear protection. More than 62% of large mechanized logging fleets utilize synthetic lubricants for hydraulic systems and transmission components. Synthetic formulations reduce friction losses by nearly 15% and can extend service intervals beyond 600 operating hours. Their oxidation resistance minimizes deposit formation in high-pressure systems exceeding 300 bar. Forestry contractors prioritize synthetic lubricants because equipment downtime can reduce productivity by 12%. Advanced additive packages further improve corrosion protection, making synthetic products the preferred choice for modern harvesting and logging equipment.
Synthetic Blend Oil (SBO): Synthetic Blend Oil holds approximately 24% market share within forestry lubricant consumption. These products combine synthetic and mineral base stocks to balance performance and affordability. Forestry contractors operating medium-sized fleets frequently select SBO formulations because they provide oxidation resistance improvements of nearly 20% compared with standard mineral oils. SBO lubricants maintain reliable viscosity under operating temperatures exceeding 120°C while supporting equipment subjected to continuous logging cycles. More than 35% of regional forestry service providers utilize synthetic blend hydraulic oils and gear lubricants. These formulations offer improved pump efficiency and reduced component wear. Their cost-performance profile supports widespread use across harvesting machinery, forwarders, skidders, and wood-processing equipment throughout commercial forestry operations.
Bio Based: Bio-based lubricants represent approximately 18% market share and continue gaining acceptance due to environmental requirements. Many formulations achieve biodegradation rates above 90% within 28 days, supporting forestry operations conducted near waterways and protected ecosystems. More than 31% of forestry operators have integrated biodegradable lubricants into selected applications. Bio-based hydraulic oils and chain lubricants reduce ecological impact while maintaining operational performance. Advanced ester technologies improve oxidation stability by nearly 20% compared with earlier generations. Environmental certification programs increasingly favor biodegradable products, particularly across managed forest areas exceeding 650 million hectares. Adoption continues to increase as manufacturers improve temperature stability, wear resistance, and storage performance for demanding forestry conditions.
Mineral: Mineral lubricants account for approximately 17% market share and remain widely used in cost-sensitive forestry applications. These products support machinery operating under moderate conditions and are commonly utilized by smaller contractors. Mineral lubricants provide adequate protection for equipment operating below 120°C and within standard hydraulic pressure ranges. Nearly 40% of small forestry operators continue using mineral products due to lower procurement costs. Continuous formulation improvements have enhanced oxidation resistance and wear protection characteristics. However, environmental restrictions in more than 45 countries have gradually reduced mineral lubricant utilization in sensitive forestry regions. Despite competitive pressures from synthetic and bio-based alternatives, mineral lubricants maintain relevance across traditional forestry equipment fleets.
BY APPLICATION
Sawmills: Sawmills account for approximately 16% of forestry lubricant demand. High-speed saw systems, conveyors, hydraulic equipment, and material handling machinery require continuous lubrication. Modern sawmills process thousands of cubic meters of timber monthly, creating substantial lubricant consumption. Lubrication programs can reduce bearing failures by nearly 25% and improve equipment availability. Synthetic and synthetic blend oils dominate applications involving elevated operating temperatures and continuous production schedules. More than 60% of industrial sawmills utilize centralized lubrication systems to improve maintenance efficiency. Chain oils, hydraulic fluids, and industrial greases remain essential products. Increasing automation within sawmill operations continues supporting demand for advanced lubrication technologies designed for precision equipment and uninterrupted production performance.
Paper & Paperboard Mills: Paper and paperboard mills represent approximately 15% market share within forestry lubricant applications. Production facilities operate extensive conveyor systems, rollers, hydraulic units, and processing equipment requiring specialized lubrication. Many paper mills function continuously for 24 hours daily, creating significant demand for high-performance oils and greases. Lubricants contribute to equipment efficiency by reducing friction losses and minimizing maintenance interruptions. Synthetic products are widely adopted because of superior oxidation stability. More than 70% of large paper production facilities implement preventive lubrication programs. Advanced formulations help extend equipment lifespan and maintain operational reliability. Continuous demand for packaging materials and paper products supports stable lubricant consumption across this application segment.
Wood Products Manufacturing: Wood products manufacturing contributes approximately 13% of forestry lubricant demand. Facilities producing plywood, engineered wood, panels, and furniture components rely on hydraulic presses, conveyors, cutting systems, and processing machinery. Equipment frequently operates at high production rates exceeding several thousand units daily. Lubricants reduce wear, corrosion, and mechanical stress across critical components. Nearly 55% of facilities utilize synthetic blend lubricants to balance performance and operating costs. Automated production systems require precise lubrication management to prevent downtime. Greases, hydraulic oils, and gear lubricants remain primary product categories. Increasing adoption of engineered wood products continues driving lubricant requirements throughout global wood manufacturing operations.
Harvesting/Logging: Harvesting and logging represent the largest application segment with approximately 27% market share. Forestry harvesters, skidders, forwarders, and feller bunchers operate under severe environmental conditions requiring specialized lubrication. Equipment utilization often exceeds 2,000 hours annually, resulting in substantial lubricant consumption. Hydraulic systems commonly function at pressures above 300 bar, demanding premium fluid performance. More than 65% of commercial harvesting operations utilize mechanized equipment. Synthetic and biodegradable lubricants are increasingly preferred because they improve wear protection and environmental compliance. Logging productivity can decline by 12% when equipment reliability decreases. Continuous investments in mechanized forestry fleets sustain strong lubricant demand throughout harvesting and logging operations.
Biomass Pellet Mills: Biomass pellet mills account for approximately 9% market share. Global pellet production exceeds 51 million metric tons annually, creating growing demand for industrial lubricants. Pellet mills utilize presses, conveyors, grinders, and handling equipment requiring continuous lubrication. High operating temperatures and production intensity increase lubricant replacement frequency. Synthetic products are frequently selected because they maintain stability under demanding conditions. More than 50% of large pellet production facilities implement predictive maintenance programs. Lubricants improve equipment reliability and support consistent pellet quality. Expanding biomass energy generation and renewable fuel initiatives continue strengthening lubricant demand within biomass pellet manufacturing operations.
Pulp Mills: Pulp mills contribute approximately 12% of forestry lubricant consumption. Processing equipment includes digesters, pumps, conveyors, refiners, and hydraulic systems operating continuously. Large facilities process several thousand tons of pulp daily, generating significant lubricant requirements. Synthetic and synthetic blend products dominate because of strong oxidation resistance and extended service life. Lubricants help reduce component wear by nearly 20% in critical equipment. More than 65% of pulp mills employ advanced maintenance monitoring systems. Operational reliability remains essential because unplanned shutdowns can significantly affect production efficiency. Continuous demand for packaging, tissue, and specialty paper products supports stable lubricant utilization across pulp manufacturing facilities.
Others: Other applications account for approximately 8% market share and include forestry transportation, maintenance services, nursery operations, and specialized wood-processing activities. These operations utilize hydraulic machinery, utility vehicles, loaders, and support equipment requiring dependable lubrication. More than 40% of support equipment operates throughout the year in commercial forestry regions. Lubricants reduce maintenance frequency and improve equipment availability. Synthetic blend products remain particularly popular due to balanced performance characteristics. Forestry infrastructure development and expanding supply chain activities continue generating demand for specialized oils and greases. The segment maintains stable growth through diverse operational requirements across the broader forestry ecosystem.
Forestry Lubricants Market Regional Outlook
Global forestry lubricant demand is concentrated in regions with extensive timber harvesting, pulp production, paper manufacturing, and biomass operations. Mechanization levels, environmental regulations, and forestry land availability significantly influence lubricant consumption patterns. North America and Europe lead adoption of advanced formulations, while Asia-Pacific continues expanding industrial forestry activities.
NORTH AMERICA
North America accounts for approximately 34% market share. The region contains more than 750 million hectares of forest resources and extensive mechanized harvesting operations. The United States and Canada dominate lubricant consumption through logging, pulp production, and wood manufacturing activities. Synthetic lubricants represent nearly 45% of regional demand. More than 60% of commercial forestry contractors utilize advanced hydraulic oils and chain lubricants. Environmental regulations support adoption of biodegradable products. Biomass production facilities and industrial timber harvesting continue generating stable lubricant requirements. Investments in precision forestry technologies further strengthen demand for high-performance lubrication solutions across North American forestry operations.
EUROPE
Europe holds approximately 30% market share and remains a leader in biodegradable forestry lubricant adoption. More than 215 million hectares of forest land support active commercial forestry activities. Countries including Sweden, Finland, and Germany maintain highly mechanized harvesting operations. Biodegradable lubricants account for nearly 38% of forestry lubricant consumption due to strict environmental regulations. Sustainable forestry certification programs influence purchasing decisions across the region. Synthetic ester-based formulations continue gaining popularity because of strong ecological performance. Advanced harvesting equipment and extensive biomass energy production contribute significantly to lubricant demand. Innovation in renewable lubrication technologies remains a defining characteristic of the European market.
ASIA-PACIFIC
Asia-Pacific represents approximately 26% market share and continues expanding through industrialization and wood-processing investments. Countries such as China, Japan, Indonesia, and Australia support substantial forestry operations. Regional industrial roundwood production exceeds several hundred million cubic meters annually. Approximately 58% of lubricant demand originates from harvesting, pulp, and wood-processing activities. Mechanization levels continue increasing across commercial forestry sectors. Synthetic blend lubricants remain widely utilized because of affordability and operational performance. Biomass energy projects and expanding paper production facilities contribute additional demand. Forestry infrastructure modernization and growing industrial wood consumption support long-term lubricant utilization throughout the Asia-Pacific region.
MIDDLE EAST & AFRICA
Middle East & Africa account for approximately 10% market share. Commercial forestry activities are concentrated in South Africa and selected timber-producing regions. Plantation forestry operations support lubricant demand across harvesting, transportation, and wood-processing equipment. More than 18 million hectares of managed plantations contribute to regional timber production. Synthetic blend and mineral lubricants remain widely utilized due to cost considerations. Forestry modernization initiatives are increasing mechanization rates and equipment utilization. Growing investments in biomass projects and wood manufacturing facilities support lubricant consumption. Environmental awareness is encouraging gradual adoption of biodegradable products across selected commercial forestry operations within the region.
List of Top Forestry Lubricants Companies
- Royal Dutch Shell
- Kluber Lubrication
- Phillips 66 Company
- Repsol SA
- Sinopec Corp
- Chevron Corporation
- Cortec Corporation
- Elba Lubrication
- Exol Lubricants Limited
- Exxon Mobil Corporation
- Frontier Performance Lubricants Inc.
- Fuchs Petrolub SE
- Penine Lubricants
- Rymax Lubricants
- Petro Canada Lubricants
- Amsoil Inc.
- Bioblend Renewable Resources
- TotalEnergies
- Lubrizol Corporation
- Castrol Limited
List of Top 2 Companies Market Share
- Shell holds approximately 12% market share supported by forestry hydraulic oils, chain lubricants, and operations across more than 70 countries.
- Exxon Mobil holds approximately 10% market share with advanced synthetic lubricant technologies supporting heavy-duty forestry equipment worldwide.
Investment Analysis and Opportunities
Investments in forestry lubricants increasingly focus on biodegradable formulations, synthetic technologies, and advanced additive chemistry. More than 45 countries enforce environmental standards influencing lubricant selection in forestry operations. Manufacturers continue allocating resources toward renewable feedstocks capable of achieving biodegradation rates above 90%. Approximately 31% of forestry operators prioritize environmentally acceptable lubricants during procurement. Research programs emphasize oxidation stability, wear reduction, and temperature performance improvements
Opportunities are expanding through biomass production, sustainable forestry certification programs, and mechanization growth. Global wood pellet production exceeding 51 million metric tons supports lubricant consumption across pellet manufacturing facilities. Precision forestry technologies and digital maintenance systems create demand for premium synthetic products with extended service intervals beyond 600 hours. North America and Europe remain major investment destinations due to environmental compliance requirements and advanced forestry infrastructure. Asia-Pacific presents significant opportunities because mechanized harvesting adoption continues increasing.
New Product Development
Manufacturers continue developing next-generation forestry lubricants emphasizing environmental performance and equipment protection. Recent innovations include biodegradable hydraulic oils with oxidation resistance improvements exceeding 20% compared with previous formulations. Advanced synthetic ester technologies maintain stable viscosity at temperatures below -35°C and above 150°C. Several lubricant producers have introduced chain oils capable of reducing wear rates by approximately 18% under severe forestry operating conditions. Nanotechnology-based additive systems are increasingly incorporated into premium formulations to improve friction control and component longevity.
Innovation strategies increasingly target sustainable forestry requirements. New bio-based products achieve biodegradation rates exceeding 90% while maintaining compatibility with modern harvesting equipment. Forestry contractors operating near protected ecosystems require environmentally acceptable lubricants that satisfy strict compliance standards. Manufacturers are developing multifunctional formulations capable of supporting hydraulic systems, transmissions, and gear components under demanding conditions. Advanced monitoring technologies integrated with lubricant programs enable predictive maintenance and contamination detection.
Five Recent Developments
- In 2023, Shell expanded biodegradable lubricant offerings supporting forestry machinery with biodegradation performance exceeding 90% under standardized environmental testing.
- In 2023, Fuchs introduced advanced ester-based forestry lubricants designed for equipment operating at temperatures reaching 150°C.
- In 2024, TotalEnergies enhanced forestry hydraulic fluid technology, extending targeted oil service intervals beyond 600 operating hours.
- In 2024, Exxon Mobil launched upgraded synthetic lubricant formulations demonstrating approximately 18% lower wear rates during heavy-duty equipment testing.
- In 2025, Castrol expanded environmentally acceptable lubricant solutions supporting forestry operations across more than 30 regulated ecological regions.
Report Coverage of Forestry Lubricants Market
The Forestry Lubricants Market report provides comprehensive analysis of lubricant demand across harvesting, logging, pulp production, sawmills, biomass facilities, and wood manufacturing operations. The study evaluates major product categories including synthetic, synthetic blend oil, bio-based, and mineral lubricants. Coverage includes equipment utilization patterns, environmental regulations, maintenance requirements, and technological advancements influencing market development.
The report also evaluates investment opportunities, product innovation trends, and sustainability initiatives affecting lubricant adoption. Regional coverage includes North America, Europe, Asia-Pacific, and Middle East & Africa, representing virtually all major forestry production zones. Analysis incorporates mechanized harvesting trends, biomass production exceeding 51 million metric tons annually, and industrial roundwood output surpassing 2 billion cubic meters. Environmental compliance requirements, biodegradable lubricant adoption rates, and forestry equipment modernization initiatives are thoroughly examined.
Forestry Lubricants Market Report Coverage
| REPORT COVERAGE | DETAILS |
|---|---|
| Market Size Value In | USD 4432.66 Million in 2026 |
| Market Size Value By | USD 5494 Million by 2035 |
| Growth Rate | CAGR of 2.42% from 2026 - 2035 |
| Forecast Period | 2026 - 2035 |
| Base Year | 2025 |
| Historical Data Available | Yes |
| Regional Scope | Global |
| Segments Covered |
By Type
Synthetic | Synthetic Blend Oil (SBO) | Bio Based | Mineral
By Application
Sawmills | Paper & Paperboard Mills | Wood Products Manufacturing | Harvesting/Logging | Biomass Pellet Mills | Pulp Mills | Others
|
Frequently Asked Questions
The global Forestry Lubricants Market is expected to reach USD 5494 Million by 2035.
The Forestry Lubricants Market is expected to exhibit a CAGR of 2.42% by 2035.
Royal Dutch Shell, Kluber Lubrication, Phillips 66 Company, Repsol SA, Sinopec Corp, Chevron Corporation, Cortec Corporation, Elba Lubrication, Exol Lubricants Limited, Exxon Mobil Corporation, Frontier Performance Lubricants Inc., Fuchs Petrolub SE, Penine Lubricants, Rymax Lubricants, Petro Canada Lubricants, Amsoil Inc., Bioblend Renewable Resources, TotalEnergies, Lubrizol Corporation, Castrol Limited
In 2026, the Forestry Lubricants Market value stood at USD 4432.66 Million.
OUR
CLIENTS