My vehicle’s transmission specifies an API GL-4 gear oil. Can I use Max-Gear?
Yes. Max-Gear possesses both API GL-5 and GL-4 certification. Max-Gear is formulated with Royal Purple’s proprietary, Synslide additive technology to provide the exceptional film strength necessary for GL-5 applications, yet it is noncorrosive to soft metals found in manual transmissions that specify a GL-4 rated lubricant.