Royal Purple Max Gear Gear Oil - 75W90 - 1 Quart HYPLXSM11 A bulb at the top

A bulb at the top of the capillary tube is designed to probe or be attached to the top or hottest portion of the radiator

Install the system yourself in a few hours with the help of a fully illustrated easy-to-follow installation manual

Proven to handle 500 miles of competition at over 9500 RPM

1977-1990 Buick LeSabre

Royal Purple Max Gear Gear Oil - 75W90 - 1 Quart HYPLXSM11 A bulb at the topRoyal Purple(R) Max Gear is an ultra tough automotive gear oil. It's designed to maximize power and provide unsurpassed protection to heavily loaded gears. It makes gears run smoother, quieter, cooler and longer without overhauls. Royal Purple(R) Max Gear outperforms other gear oils because it combines the highest quality synthetic oils with Royal Purple's proprietary Synslide additive technology. Royal Purple(R) Max Gear is recommended for use in