#REDLINE GEARBOX OIL REVIEW MANUAL#

Check out the Redline site - Ĭheck out Redline's 70W-75 GL-4 gear oil and type in our Mirage. When the oil company doesn't recommend their oil for our Mirage, that is a HUGE red flag for me. The wrong frictional properties will result in poor shift quality and possibly accelerated synchronizer wear.' Viscosity that is too low could cause the synchronizer and dog gear to engage too quickly, resulting in grinding or hard shifts and abnormal transmission wear. Viscosity that is too high could prevent shifting the gears until the transmission warms up or result in abnormally high temperatures during operation. The lubricant’s viscosity and friction properties play a vital role in shift quality. 'Whether you’re driving a sports car or an over-the-road truck, smooth shifts are important. I realize AMSOIL sells oil products, but they are also trying to help customers make a wise decision.

#REDLINE GEARBOX OIL REVIEW MANUAL#

If a Mirage owner's manual states 75W-80 GL-4 manual transmission oil, I would stick with that. I've used them many times in the past for engine oil analysis and they're very helpful. I've asked them how they recommend I proceed with testing this oil with minimal risk to my transmission. I have contacted Blackstone Labs, a third party oil analysis company. Less churning means more power and efficiency.Īnyways, I post this info because I am thinking about using it in the Mirage. Thats a heck of a lot less churning going on. Anyway, at 104F, you can see the 70W/75W is 5 times thinner than the 75W80 oil. That already seems warm for a manual transmission, but I haven't measured my transmission's temperature. It is quite a bit thinner than Redline MTL 75W80 that many here have used.įor reference, 40C is 104F. So, I'm not exactly sure what to think about it.

You'll notice this doesn't follow the normal naming convention.

However, what I did find was Redline MT-LV 70W/75W. Therefore, I was looking to see if I could get a 70W80 or even 65W80. Here is a chart to help illustrate things. You just don't want it to get too thin, or you can accelerate wear in your transmission. All oil is substantially thicker when cold, so getting a low first number is a good thing as it will always be thinner when hot. The 75W is the engine viscosity when cold, and the 80 is the viscosity when its hot. I was poking around today looking at different gear oils.

Redline gearbox oil review