






⚙️ Shift smarter, not harder — gear oil that keeps you ahead of the pack!
Red Line 50505 MT-85 is a premium 75W85 GL-4 synthetic gear oil designed for superior gear and synchro protection, ensuring quicker, smoother shifts even in cold climates. Safe for brass synchros and recommended for a wide range of manual transmissions including Nissan, Mitsubishi, Hyundai, and Kia models, it leverages advanced ester base stocks for extreme stability and durability. Trusted by performance enthusiasts since 1979, this gear oil delivers uncompromising quality and longevity.






| ASIN | B019XB6FQO |
| Best Sellers Rank | #40,025 in Automotive ( See Top 100 in Automotive ) #489 in Automotive Oils |
| Brand Name | Red Line |
| Container Type | Can |
| Customer Reviews | 4.8 4.8 out of 5 stars (838) |
| Global Trade Identification Number | 00083522505055 |
| Included Components | MT-85 75W85 GL-4 - 1 gallon |
| Item Form | Oil |
| Item Type Name | MT-85 75W85 GL-4 - 1 gallon |
| Item Weight | 7 Pounds |
| Liquid Volume | 128 Fluid Ounces |
| Manufacturer | Red Line |
| Material | Synthetic |
| Model Number | 50505 |
| Number of Items | 1 |
| Part Interchange Info | 50505 |
| Part Number | 50505 |
| Recommended Uses For Product | Automotive |
| Specific Uses For Product | Manual transmission lubrication, specific vehicle models and transmissions |
| UPC | 083522505055 |
| Unit Count | 3785.41 Milliliters |
| Viscosity | 75W-85 |
G**A
Great product! Worth the money!
Product exactly as described...great product A++
J**Y
Mejor aceite del mundo. 100% sintetico. Lo compre para un volvo s60 que en invierno cuando arrancava el coche el canvio iva tan duro que tenia que poner la marcha casi a golpes no se que aceite llevava pero ahora va igual de fino en frio bajo como en caliente.
A**L
Worked well in our 08 Nissan Frontier 6 Speed Manual. Smooth shifting and GL4 spec to protect the syncro rings.
J**S
This stuff is fantastic, I'm never going with another transmission fluid ever again. My car shifts SO much smoother now both while cold and warmed up. It's so much less notchy. I drive a genesis coupe, and they have a tendency to grind 1st to 2nd or even 2nd to 3rd if you're driving "spiritedly". It happened to me several times and it was always such a horrible, cringe inducing feeling where I felt so bad to my poor car. After using this fluid I have yet to ever have this problem. Granted I've also upgraded the trans mount to polyurethane, and upgraded the shifter to a chassis mounted short shifter assembly. But still, this fluid is just the cherry on top. It shifts like a freaking dream now. Well worth the extra money. Grinding gears will eventually lead to a destroyed transmission, if this fluid keeps that problem from happening then I say an extra 30 bucks for a transmission fluid change over other brands is WELL worth it. It's such a joy to row through the gears now.
K**I
ممتاز جدا ومناسب لسيارتي جنيسس القير العادي وإلى الان لم الاحظ مشاكل في تبديلات القير ويستحق مني خمس نجوم . الحاجه الوحيده التي اتمناها من المتجر والبائع مستقبلا هي سرعه الشحن وسرعة الوصول للعميل وشكرا لكم
オ**ジ
シフトフィーリングが改善されました、この数年RED LINEを使用しています。
Trustpilot
3 weeks ago
1 day ago