I am currently using Redline 10W40 synthetic oil in my car, but I am thinking about changing over to Royal Purple. One of the main reasons for switching over is that I dont want to have to order the Redline and pay shipping etc, and plus its a little bit more expensive. I can get the Royal Purple local here, and I think its a few dollars cheaper. My question is, how does it perform compared to the Redline oil and which one should I get?? I believe everyone says to get the RP 41 oil, and that is the same as 10W40 if memory serves me correct. I would appreciate the oil guru's to chime in.

Brian