Frequently Asked Questions
Do I need an aftermarket additive in with the BR for flat-tappet break-in?
No. Joe Gibbs Driven Racing Oils are properly balanced to protect your racing engine and reduce friction. Adding an aftermarket additive can not enhance the performance of the oil. In fact, adding an aftermarket additive could change the balance of the oil, which could lead to engine failure. This is known as additive clash, and should be avoided. Learn More About Additive Clash >