My vehicle’s transmission specifies an API GL-4 gear oil. Can I use Max Gear?

Yes. Max Gear is completely non-corrosive to soft yellow metals (brass, bronze, copper) so it is synchronizer-safe like a GL-4 gear oil. However, because of Royal Purple’s proprietary Synerlec additive technology, Max Gear oils retain the load carrying and shock protection capability of a GL-5 gear oil.

Category: Transmission & Gear Oils
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