The American Le Mans Series is a series of sports car endurance racing events based on the world-famous Le Mans 24 Hours. The starting line up for every race includes both factory and privateer racing teams going for overall wins as well as wins in one of four classes of competition: LMP1, LMP2, GT1 and GT2. The LMP, or Le Mans Prototype, classes are for specially-designed prototype race cars with little resemblance to street cars. The GT1 class is for cars designed to mimic street cars but with little or no parts sharing between the race and production versions. The largest and most popular class, GT2, is for modified street machines. Mobil 1 sponsors Corvette and Porsche Racing Teams in the GT1 and LMP2 class.

Most of the teams which compete in this series are key B to B customers who have chosen Mobil 1 as their first fill. Mobil 1 is also proud to be the title sponsor of the Mobil 1 12 Hours of Sebring, the opening event of the ALMS season and one of the most challenging and legendary races.