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⚙️ Shift smarter, not harder — gear oil that keeps you ahead of the pack!
Red Line 50504 MT-85 75W85 GL-4 Gear Oil is a premium manual transmission fluid designed for superior gear and synchro protection. Its unique polyol ester base ensures smooth, quick shifts even in cold climates while being safe for brass synchros. Perfectly suited for high-performance vehicles like Nissan 350Z/370Z, Mitsubishi Evolution, and more, this 1-quart bottle delivers trusted, long-lasting transmission care backed by Red Line’s decades of expertise.






| ASIN | B004D4URV6 |
| Best Sellers Rank | #15,841 in Automotive ( See Top 100 in Automotive ) #289 in Motor Oils |
| Brand Name | Red Line |
| Container Type | Bottle |
| Customer Reviews | 4.8 4.8 out of 5 stars (903) |
| Global Trade Identification Number | 00083522505048 |
| Included Components | (1063027) MT-85 75W85 GL-4 GEAR OIL - QUART |
| Item Form | Fluids,Oil |
| Item Type Name | ENGINE OIL |
| Liquid Volume | 32 fluid ounces |
| Manufacturer | Red Line |
| Material | Polyol Ester |
| Model Number | RED50504 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 50504 |
| Recommended Uses For Product | Vehicle |
| Specific Uses For Product | Differential oil, final drive oil, gear oil, transfer case fluid, Nissan 350Z and 370Z, Mitsubishi Evolution, Hyundai, Kia, Quaife synchro manual trans applications |
| UPC | 083522505048 |
| Unit Count | 32 Fluid Ounces |
| Viscosity | 5w-30 |
| Warranty Description | LIMITED WARRANTY |
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