Maxum4 Ultra is a superior high-performance racing synthetic motor oil. Maxum4 Ultra delivers the best in anti-shear high temperature engine protection for carbureted, fuel injected, turbocharged and supercharged engines. Maxum4 Ultra has additional antiwear and extreme pressure additives which are designed to protect highly modified 4-cycle engines. Maxum4 Ultra improves engine performance, eases cold engine starts, lengthens oil life, decreases sludge and neutralizes corrosive alkalinity. Special detergent and dispersant additives prevent varnish and carbon deposits. Maxum4 Ultra gives high performance, high-rev engines advanced protection from viscosity breakdown for all engine makes, foreign or domestic.