CHAMPIONSHIP WINNING FORMULA! STAY-Nu Oil helped propel Rehagen Racing to the 2009 Grand Am GS Championship. It can do the same for you! STAY-NU Racing Oil contains a highly polarized ester complex. It provides a superior electro-chemical monomolecular protective film on engine metal surfaces reducing friction and increasing engine efficiency. Independent testing confirmed a reduction in engine temperature while on the track. Rehagen Racing trusts Stay-Nu in their race cars and so should you.