Redline MT-90 is hands down the best gear oil for the price. We mix this gear oil with lightweight shockproof (about 30% lightweight shockproof) and have never once lost a gearbox in all the racing, and endurance racing, we've done. With no transmission cooler installed on any of our race cars, thats really saying a lot. We put it in all of our customers cars and everyone loves it. It reduces any notchyness in the gearbox and even helps reduce syncro crashing if some syncros are on their way out. One of SG's favorite products!

Manufacturer Info:

* 75W90 GL-4 gear oil (similar to SAE 5W40/10W40 engine oil viscosity)
* Popular in Nissan, Mazda, Mitsubishi, VW/Audi, Lotus Elise/Exige, Toyota
* Offers quicker shifts, perfect synchronizer coefficient of friction
* Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
* High performance gear protection and longer synchro life
* Eliminates notchy shifting, even when cold
* Satisifies the gear oil viscosity requirements of 75W, 80W and motor oil viscosities of SAE 40, 10W40, and 15W40
* Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified
* Appropriate coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement)
* Red Line offers lubricants to pinpoint nearly every transmission application
* MTL & MT-90 are not for use in differentials with hypoid gears
* Excellent gear and synchro protection, balanced slipperiness for easier shifting in cold climates
* Excellent for high- and low-mile transmissions
* Compatible with petroleums and other synthetics

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