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⚙️ Shift into the future with flawless precision!
Red Line 50304 MT-90 is a premium synthetic 75W-90 GL-4 manual transmission lubricant designed to protect gears and extend synchro life. It ensures smooth, quick shifts even in cold conditions and is safe for brass synchros, making it ideal for a wide range of manual transmissions including Nissan, Toyota, and Mazda. Trusted since 1979, this 4-pack quart set delivers professional-grade performance for enthusiasts and pros alike.






| ASIN | B003P550IE |
| Best Sellers Rank | #33,840 in Automotive ( See Top 100 in Automotive ) #59 in Gear Oils |
| Brand Name | Red Line Oil |
| Container Type | Bottle |
| Customer Reviews | 4.8 4.8 out of 5 stars (429) |
| Item Form | Fluids,Oil |
| Liquid Volume | 128 Fluid Ounces |
| Manufacturer | Red Line |
| Material | Synthetic |
| Model Number | 50304 |
| Number of Items | 4 |
| Part Number | 50304 |
| Recommended Uses For Product | Gear Oil |
| SAE J300 Viscosity Grade | 75W-90 |
| Specific Uses For Product | Manual transmissions and transaxles, particularly in vehicles from Nissan, Toyota, and Mazda, and in conditions that require gear protection, smooth shifting, and longer synchro life. |
| UPC | 737534816608 |
| Unit Count | 128.0 Fluid Ounces |
| Viscosity | 75W90 |
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