The final step to building in a freshly built engine is to run it with the proper lubricant to promote break in and ring seal. Driven Oil's proprietary formula is engineered to promote exceptional sealing of all metal-metal components inside your engine. No additional additives are required. After a short period of run time under moderate load (do not idle the engine excessively) your rings will be properly seated into the cylinder walls and your camshafts matted to their buckets.
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