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MT-90 75W90 GL-4 Gear Oil

Brand:RED LINE® SKU: 50309

£28.20 (Inc. VAT)

Tax included

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  • 75W90 GL-4 gear oil (similar to SAE 5W40/10W40 engine oil viscosity)
  • Popular in Nissan Mazda Mitsubishi VW/Audi Lotus Elise/Exige Toyota Mendeola transmissions and Atlas transfer cases for Off Road
  • Offers quicker shifts perfect synchroniser coefficient of friction
  • Safe for brass synchros as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
  • High performance gear protection and longer synchro life
  • Eliminates notchy shifting even when cold
  • Satisfies the gear oil viscosity requirements of 75W90 80W90 90 and engine oil viscosities of SAE 40 10W40 and 15W40
  • Recommended for GL-1 GL-3 and GL-4 applications as well as where most special synchromesh fluids are specified


API GL-4/GL-3/GL-1
SAE 75W90 SAE 90/80W90 SAE 40/10W40/15W40
Alfa Romeo
Audi G 052 911
BMW 81 22 9 407 305
Castrol BOT 130M Castrol BOT 328 Castrol SAF AG4 Castrol SHC 630 Castrol TAF-X 75w-90
Castrol Syntrans Transaxle 75W-90 Ford F32Z-19C547-MA
Ford M2C175-A Ford M2C200-B
Ford WSS-M2C203-A1 Ford XT-4-QGL
GM 12345371
GM 12345724
GM 12345871
GM 12346074
GM 89021806
GM 89021807
GM-Daewoo EDS-M-8049
Hyundai/Kia 08950-00010-A Hyundai/Kia 04300-5L1A0 Jeep 0489722AA
Mazda (MES) 115A Mazda 0000-77-114-QT
Mazda L.L. Manual Gear Oil IS MB A 001989510310
Nissan Mission Oil MP-G HQ Opel
Toyota 08885-80917
Toyota 08885-81023
Toyota 08885-81026
VW/Audi G 005 000
VW/Audi G 005 100
VW/Audi G 045 190 A2 VW/Audi G 052 145
VW/Audi G 052 157
VW/Audi G 052 911
VW/Audi G51 VW/Audi G50
VW/Audi 501.5

Further Info

RED LINE MT-90 HIGH-PERFORMANCE GEAR OIL is a fully-synthetic ester-based lubricant designed for use in manual transmissions and front-wheel-drive transaxles. This shear-stable formula resists breakdown for extended periods and offers more consistent viscosity in warm and cold temperatures for less gear noise and improved shifting. This fluid is less slippery for improved synchroniser coefficient of friction and offers stronger film strength for better wear protection. 

  • Appropriate coefficient of friction for most manual transmission synchronisers (other's synthetic gear oils are often too slippery for proper synchro engagement)
  • Red Line offers lubricants to pinpoint nearly every transmission application
  • MT-LV, MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears
  • Excellent gear and synchro protection, balanced slipperiness for easier shifting in cold climates
  • Excellent for high- and low-mile transmissions
  • Compatible with petroleums and other synthetics

A full OEM compatibility list can be found in the 'Technical Details' tab.

MT-90 OEM Compatibility

MT-90 Data Sheet

MT-90 Safety Data Sheet

MT-90 White Papers

API Service Class GL 4
SAE Viscosity Grade (Motor Oil) 15W40
SAE Viscosity Grade (Gear Oil) 75W90
Vis @ 100°C, cSt 15.6
Vis @ 40°C, cSt 90
Viscosity Index 185
Pour Point, °C -45
Pour Point, °F -49
Brookfield Viscosity @ -40°C, Poise 320