Lucas Synthetic 5 Racing Oil is a true high performance synthetic racing oil. It provides a super slick, heat resistant, long lasting film of Protection not found in ordinary light weight motor oils. It Is blended with an exclusive additive package that controls drag like a zero weight oil and yet protects metal like a heavy multiviscosity oil. Lucas Synthetic 5 Racing!! Oil is a long lasting oil designed to operate at high temperatures and high RPMs and still maintain stable oil pressure. Lucas Synthetic 5 blends with other motor oils, synthetic or petroleum. For any situation that requires a heavier oil add Lucas Pure Synthetic oil Stabilizer to gain the desired viscosity. Lucas Synthetic 5 was originally designed for NASCAR qualifying engines and NHRA Pro Stock engines, but has proven to also be excellent for Kart engines and Junior dragsters. Lucas Synthetic 5 was used by the 2003 and 2004 NHRA National Champion In the very demanding Competition Eliminator class.