Royal Purple Break-In Oil

Royal Purple break-in oil is designed for the engine builder who has grown increasingly concerned that current engine oils that are API licensed for new cars and trucks do not provide adequate wear protection for their freshly built performance engine, particularly those using flat tappet camshafts and lifters. Royal Purple break-in oil is formulated to provide the critical wear protection needed by the engine valve train and camshaft while allowing new piston rings to quickly seat to the engine cylinder walls. Royal Purple break-in oil combines highly refined mineral oil (preferred for engine break-in) with an advanced additive package containing elevated levels of zinc/phosphorus anti-wear additive to optimize wear protection during the sensitive engine break-in phase. Royal Purple Break-In Oil is a fully formulated conventional 10W-30 engine oil and does not require the use of any other chemical additives. Royal Purple recommends using Royal Purple break-in oil for a minimum of 500 to 1,000 miles in street driven gasoline engines to assure that the complete ring break-in has been completed before switching to one of their full synthetic engine oils. If need be, you can use for up to 2,500 miles. Show Less