Lucas engine break-in oil is designed to protect your engine on its initial startup in of both flat tappet and solid roller camshaft applications. It features higher levels of zinc and phosphorous to offer maximum protection, and will also provide a quicker, more efficient piston ring seal and is compatible with ethanol, methanol, and all high-octane racing fuels. This break-in oil requires no moly supplement and no additional additives. Less ring blow-by equates to more horsepower and a better piston ring seal. Protect your engine’s performance and life expectancy with Lucas engine break-in oil.