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Red Line Oil 50305

Red Line Oil Synthetic Manual Transmission Lubricant MT-90 75W90 GL-4


made in usa

Red Line Oil Synthetic Manual Transmission Lubricant MT-90 75W90 GL-4 $71.95
Synthetic Manual Transmission Lubricant
  • MT-90 75W90 GL-4
  • 1 gallon
  • Red Line Oil 50305 Details

    MT-90 75W90 GL-4 Popular in Nissan, Toyota and Mazda manual transmissions and transaxles as well as other selected applications, this is a 75W90 GL-4 Gear Oil that's slightly heavier than MTL. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting.

    Red Line Oil's manual transmission fluids - MTL and MT-90 - are designed to provide excellent protection and improved shiftability for manual transmissions and transaxles, having cured the problem of hard shifting in thousands of transmissions with shifting troubles. How? Red Line manual transmission fluids have the appropriate coefficient of friction for most manual transmission synchronizers (many gear oils, engine oils, and ATFs are too slippery for proper synchro engagement). And, the wide viscosity of MTL and MT-90 allow proper shifting over the entire temperature range which the transmission will experience. The synthetic base oils used have a very high viscosity index which provides relatively constant viscosity as temperature changes. MTL is a low 70W at very low temperatures and a high 80W, nearly an 85W, at elevated temperatures, providing adequate viscosity to prevent wear and deaden gear noise. MT-90 is a thicker 75W90 version of MTL. The shear stability and oxidation stability of these products are excellent, thus the physical characteristics of Red Line MTL and MT-90 will change little with use. Try Red Line manual transmission fluids in your vehicle!


    Sold individually
    Gear Lube Volume
    1 gallon
    Limited Slip Additive
    Oil Weight
    Shipping Weight:
    Package Height:
    Package Depth:
    Package Width:

    Red Line Gear Oils and manual transmission fluids are designed to give improved gear protection at high temps. They reduce differential temps 10-70°F. Efficiency improvements between 1-5% are typical. The synthetic base stocks and additives allow the gear oils to carry higher loads compared to petroleum lubricants. Try Red Line manual transmission fluids in your vehicle.

    50305 is rated 4.8 out of 5 by 5.
    Rated 5 out of 5 by from Preserves transmission synchros I bought this item a month or two back for my project car that I still haven't gotten running but I've used this gear oil in the past and it's great stuff.
    Date published: 2018-02-04
    Rated 5 out of 5 by from Overall a good product! Used this for my BMW e30 and my brother's mk4 Golf. It really does smooth out the shifts. My transmission has a naturally notchy feeling shift and the Redline helped smoothed it out. The fluid is a bit thicker than others so cold mornings will make it feel different due to that fact. Once you're warmed up it's all good! Get yourself a hand pump with a tube attached and it'll be a breeze to get it in.
    Date published: 2015-11-24
    Rated 5 out of 5 by from cost is up there, but well worth it Tried using motor oil which was recommended on jeep forum, didn't like it. Real jeepers swear by redline mt 90 so i ordered it for my ax5. Made a big difference. In my 95 yj 4 banger. Well worth the money. Delivery from jeggs. Was quick, got in four days.
    Date published: 2015-02-14
    Date published: 2014-11-04
    Rated 4 out of 5 by from MT-90 for 1957 Austin Healey Updated my 1957 Austin Healey 100-6 by using Redline MT-90. Noticed transmission noise reduced and the shifting was quieter. Good product so far
    Date published: 2016-06-15
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