Designed to keep your engine running like new, Mobil 1 Synthetic Motor Oil will clean up virtually all engine sludge in just one oil change. And it not only cleans up sludge, it helps prevent build-up. Its advanced formula provides excellent lubrication and wear-protection. Enhanced frictional properties aid fuel economy. Recommended for most gas, propane and E-85 fuelled cars and light duty trucks. 4.4L.