Gear oil manufacturer for manual transmissions, hypoid differentials and heavy-duty drive axles. API GL-4 / GL-5 / MT-1 formulas from 1L to 200L — bulk supply, stable production and export solutions for distributors across international markets.
TERZO is a gear oil supplier supplying transmission and axle lubricants for manual gearboxes, hypoid differentials, limited-slip axles and heavy-duty commercial drivelines. Our formulations are developed to protect gears under high load, shock load and sustained high temperatures across global markets.
As a bulk gear oil supplier, we support distributors, importers, fleet operators and workshop networks with consistent product quality, stable production, and reliable delivery. From local distribution to international export, TERZO ensures supply continuity for partners operating in international markets.
TERZO supports partners with bulk gear oil supply tailored for distribution and large-scale operations. This ensures partners can maintain inventory, avoid stockouts, and build consistent customer relationships.
Distributors and importers
Transport and logistics fleets
Workshops, transmission and axle service centers
Auto parts retailers, oil traders and wholesalers
Stable production output
Reliable shipping schedules
OEM and private label solutions
At TERZO, quality isn’t just a promise; it’s the foundation of everything we do. We take pride in our rigorous quality management system, which has earned us a range of prestigious certifications, including SGS, ISO, IAF, IATF, GHG
Both are API gear oil service classifications. GL-4 is designed for spiral-bevel and hypoid gears at moderate speeds and loads and can be used in selected manual transmissions and transaxles. GL-5 is designed for gears, particularly hypoids in automotive axles, under high-speed shock load and low-speed, high-torque conditions. The correct level depends on the OEM specification of the gearbox or axle, so always check the vehicle manual before choosing.
Not as a blanket rule. The two levels are not interchangeable in every gearbox, and some manual transmissions are specified by the OEM for GL-4. Follow the OEM-specified API level and SAE grade. If the OEM calls for GL-4, choose a product whose rating list includes GL-4, such as Special Gear LD/LS 75W-90, Uni Gear Oil MT/LD 75W-80 or Uni Gear 85W-140.
Limited-slip differentials need controlled friction behavior inside the differential, so LS gear oils are formulated with limited-slip properties on top of extreme-pressure protection. TERZO Special Gear LD/LS 75W-90 and Uni Gear 85W-140 are formulated with limited-slip properties. For clutch-type differentials, confirm the OEM fluid specification.
75W-90 is the all-season multigrade for manual gearboxes and differentials and the widest-use grade for mixed passenger and truck fleets; its SAE J306 low-temperature limit is −40 °C. 80W-90 is a heavier grade with a −26 °C limit, suited to hypoid differentials under heavy-duty conditions where very low temperatures are not a concern. 85W-140 is the highest-viscosity grade in the range (−12 °C limit), intended for heavy-load, high-temperature axles. 75W-80 (Uni Gear Oil MT/LD) is a lower-viscosity grade for heavy-duty manual transmissions with extended-drain and fuel-economy requirements. Grade choice always follows the OEM specification.
Passenger car gear oils come in 1L and 4L; MP Gear Oil and Gear Oil 80W-90 in 18L and 20L; Uni Gear Oil MT/LD 75W-80 and Uni Gear 85W-140 in 20L and 200L. MOQ and lead time depend on SKU and destination — submit an inquiry for a quotation. OEM and private label packaging is supported, with TDS, SDS and batch-specific COA available.
TERZO® is a Globally Operated Lubricant Brand.
terzooil.com is the official brand website of TERZO
