








⚙️ Shift smoother, last longer — the gear oil your ride deserves!
Red Line MT-90 75W90 GL-4 gear oil is a premium manual transmission lubricant engineered for flawless shifting and robust gear protection. Its unique friction coefficient prevents notch shifts and gear noise, especially in cold weather, while its brass-safe, high-temp resistant formula ensures longevity and reliability for manual transmissions and transaxles. Trusted by enthusiasts since 1979, it’s the go-to choice for professionals demanding peak performance and durability.






| ASIN | B002INX20C |
| Amazon Bestseller | #270,051 in Automotive ( See Top 100 in Automotive ) #339 in Gear Oils |
| Brand | Red Line |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,568) |
| Date First Available | July 31, 2015 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions L x W x H | 19.1 x 10.2 x 28.6 cm |
| Item Weight | 2.27 Kilograms |
| Item model number | 50305 |
| Manufacturer | Red Line |
| Model | 50305 |
| OEM Part Number | 50305 |
| Product Dimensions | 19.05 x 10.16 x 28.58 cm; 2.27 kg |
Z**.
Get what you pay for, though pricey, irrefutable 'performance' gains: vehicle shifts much much much more smoothly now - no more 'crunchy' shifts, & all gears operate better in a wider range of temps as well. Prior to the fluid change, 1st & Reverse were the more difficult gears to get in to, especially in colder weather - before the fluid had a chance to warm up - now they all shift smooth as butter. I can also shift much faster as a result. Last little + is that the fluid doesn't smell horrid.
M**.
Ottimo prodotto
R**S
Gear shifting in Audi 01E dropped from 0,5 to 0,3 seconds
M**0
Excellent fluid recommended by others.
S**A
I've been using this oil for a while now and it consistently performs well. My engine runs smoothly and quietly, and I’ve noticed improved fuel efficiency compared to some other brands I’ve tried. It's a trusted formula, and you can’t beat the value for the price.
Trustpilot
1 month ago
1 month ago