A lot of the Camaro and Firebird guys swear by this oil, what do you guys think about it though? I know their street oils are not fully synthetic, but their race oils are. Apparently their race oils have a TBN of 11, and RP's tech reps claim it's safe for use in a daily driver. I'd be more inclined to use their race oil, especially when the specs on their street oil aren't that impressive (most notibly, the low 400F flash point of their 10w30, lower than most conventional oils) What exactly is this Synerlec additive in RP? Do they perhaps use moly? Or have they just loaded up the oil with a ton of zinc and phosphorus? Their websites.... http://www.royalpurple.com/ and http://www.synerlec.com/ ....both make their oil sound impressive, however talk is cheap when it comes to an oil maker on their own website. Every oil maker wants you to believe theirs is the best.