Only the highest performance GM engines are being factory filled with Mobil 1 Supercar. This includes the most powerful Corvette, Cadillac, and Camaro models that feature the LT1 or LT4 engines, and any future engines that require a dexosR-approved motor oil. Not only that, the Mobil 1 Supercar family of products are the first to receive the coveted dexosR-approval.