Red Line fully synthetic 10W30 high performance engine oil popular in crate engines and some high performance V8 engines. Formulated to provide a thicker oil film than a petroleum based 10W40 oil.The high performance engine oil range from Red Line have been developed using fully synthetic ester formulas to provide the very best wear protection and friction reduction resulting in longer lasting engine components, improved fuel economy and better engine performance.High levels of detergent additives in the oil keep the engine cleaner and allows for longer drain intervalsImproves fuel economy and piston ring seal for better performanceHigh natural viscosity index provides a thicker oil film on bearings and cams to give excellent wear protection to extent component lifeOffers increased lubrication of hot metals compared to other synthetic oilsCompatible with other conventional and synthetic engine oilsSpecifications: ACEA A3 / B3 / B4, API SN / SM / SL / CFRecommendations: ACDelco 10-9019