ehroof

you need to be careful with high oil content on internal one way bearing engines, the sh engines have internal one ways on them for the pullstarts and the excess oil will make them slip.... Traxxas top fuel has a high oil content, along with a few others.... I wouldnt suggest any more than 18%. On engines such as the trx 3.3 you can use high oil content because the one was is external, the vx engines and most if not all os engines also use external one ways.