Quote Originally Posted by QWK D16
Royal Purple XPR is a good oil for any car that is turbod or spraying nitrous. The XPR has an additive that breaks down any extra fuel that bypasses the rings and gets into the crankcase...and I dont give a shit about how much you pay for oil, but if you thin it out to the point were the viscocity value is changed...you WILL spin a bearing. If you dont believe me then the next time you boost or spray your car, pull the dipstick and see if it has a fuel smell....AND see if the level has actually gone up some. If you have this happening, you need the XPR!
quality post.