XL Extended Life Synthetic Motor Oils provide better wear control, high- and low-temperature protection and increased fuel economy compared to conventional oils. Formulated with extended-drain boost technology, XL Synthetic Motor Oils provide superior performance for up to 10,000-miles/six months, or longer when recommended in owner's manuals or indicated by electronic oil life monitoring systems. During normal engine operation, the combustion process creates acidic by-products that can lead to internal component corrosion and a reduction in the life expectancy of the engine oil and engine itself.
Formulated with extended-drain boost technology, XL Synthetic Motor Oils employ high-quality synthetic base stocks and a unique additive chemistry to neutralize acids longer than conventional oils. The extra additive package effectively raises the Total Base Number (TBN), a measure of an oil's useful service life, and provides superior protection and performance throughout the entire drain interval.