The only reason that RP got ran in the Corolla it was on sale at Walmart for $20 a Jug and it perked my curiosity! Just like you I have enough top off oil sitting around now next spring may be a Franken brew OCI! I have yet to see any real benefit to the so called Boutique oil in personal experience or in Documented white papers that would suggest the extra cost brings big time benefits in engine life!
