Royal Purple HPS oils are fortified with a high level of zinc / phosphorus anti-wear additive and a generous dose of Royal Purple's proprietary Synerlec additive technology. These unique formulations...

Royal Purple Max ATF is a full synthetic, multi-vehicle, high performance, long life, automatic transmission fluid. Max ATF meets the viscosity and performance requirements of late model automatic...

Royal Purple Max EZ is an advanced power steering fluid designed to maximize the life and performance of all power steering units. Max EZ is formulated with a blend of select synthetic base oils plus...

Max Gear is a high performance automotive gear oil designed to provide maximum protection to heavily loaded gears while increasing power throughput through the drive train. Max Gear virtually...

Max Gear is a high performance automotive gear oil designed to provide maximum protection to heavily loaded gears while increasing power throughput through the drive train. Max Gear virtually...

Max Gear is a high performance automotive gear oil designed to provide maximum protection to heavily loaded gears while increasing power throughput through the drive train. Max Gear virtually...

Max Gear is a high performance automotive gear oil designed to provide maximum protection to heavily loaded gears while increasing power throughput through the drive train. Max Gear virtually...

Royal Purple Max-Atomizer is a highly concentrated, high performance fuel injector cleaner. It is specially formulated to solve problems with today's direct injection engines, but can be used with...

Royal Purple Max-Boost is a high-performance octane booster and fuel treatment that increases gasoline octane, reduces emissions, and enhances engine performance while stabilizing fuel. Max-Boost is...

Royal Purple Max-Clean is a state-of-the-art high performance fuel system cleaner that maximizes the performance of your fuel system. Max-Clean restores fuel economy by deeply penetrating deposits...

Formulated with select synthetic base oils and Royal Purple's proprietary Synerlec additive technology, Max-Cycle provides improved film strength when compared to the leading synthetic and mineral...

Formulated with select synthetic base oils and Royal Purple's proprietary Synerlec additive technology, Max-Cycle provides improved film strength when compared to the leading synthetic and mineral...