Any updates? I've been using the stuff in my Titan (5.6) for the last 2 years and I'm converted. I swear by it at this point. For a true analysis you could always send a sample to blackstone labs in Fort Wayne, IN. They are great with oil analysis and engine readouts just from a sample.

i ran royal purple in my ls1 in my rx7 and it did fine i never dyno'ed it with royal purple so i dont know if its true that it gives you more power. I do know that i stopped using it because it cost so dam much..lol thats the only reason why i stopped using it. might get a case for it this year

I don't buy it for the "power increase" more the fact that it lasts a long time. With the limited driving I do mostly around town or to other posts it lasts me about 6 months or more before it needs changing.

then for that just get Mobile1 syn. just as good i put it in my LS1 in march and it did fine for me all season i put about 3000 miles on my motor over the summer and i checked it ever few weeks and it was still pretty clean. the only hard driving i did the my ls1 was on dyno day after that it was just running on the street and going to local cruises