Is it true that your oils lose their performance edge after six or eight passes? (Drag Racing)

My retailer doesn’t carry XPR – why can’t they order it?
August 17, 2018
Can I use your Max ATF® in my transmission?
August 17, 2018

Is it true that your oils lose their performance edge after six or eight passes? (Drag Racing)

No. Royal Purple has not found any evidence that it shows deterioration in performance after being subjected to race conditions. Excessive fuel dilution may effect the performance of any engine oil; however, XPR and Nitro Plus oil offer greater protection than other oils even with excessive fuel contamination.