+11. I normally go about 6,000 miles between oil changes with mine. And the stuff still looks pretty clean when I do.I've always used royal purple. People say its overpriced and you just pay for the name but instead of changing every 3k I now do like 4500-5k miles oil changes. Plus I can redline higher without smelling the burning oil smell. I highly reccomend it
Yeah mine is a GT... I don't expect to see any hp gains or anything like that, I'm just wondering if you can feel a difference in the way it performsIs it a v8? I've been wondering this too.
Nice and yea it still looks good for the mileage when I change it+11. I normally go about 6,000 miles between oil changes with mine. And the stuff still looks pretty clean when I do.