So it was time to change the oil and I decided to try Redline's 5W-20 synthetic, since as far as I can tell they are the only ones with a 5W-20 synthetic out on the market (I hear Mobil 1 will have one some time this year). I had been running Mobil 1 5W-30, which seemed fine, although I really wanted to run something that would be at factory spec. I felt like my mileage has been a little low as of late ~18 MPG (heavy stop and go); so I'll be interested to see what it is with the Redline. Overall, I can't really tell a differience in terms of sound or performance, but I'll watch it and let ya know. This stuff ain't cheap, its runs ~9.50 a quart and the V6 needs 6 quarts. Flipside is that they say for non racing use, you can easily get 10K off one oil change. Don't think I'll push it that far, but I'll see how it does after 7K. My mobile 1 held up fine for 5K, and that was with my track time. I let ya know how things turn out.