Originally Posted by TXSpeedDemon

I've used RP before in my turbo Mazda, didn't like it. Noticed harshness and engine vibration at high RPMs. Made me nervous. Also seemed to lose power although I have no dyno #s to prove that. Switched back to Mobile 1 and have had no problems.

In my Nissan I use Redline. I change it ever 5K miles (about every 9 months). Twice so far and now due for it's third. The previous two times the oil came out looking brand new.

I should also mention my car seemed to burn a lot of oil before using Redline. At the first oil change I gave her (around 1K miles) she was almost 2 quarts low. I didn't check her when I picked her up so it's possible she was just short from the dealer, but haven't noticed any significant loss after switching to Redline.