I don't know, call it the UOA's, other Honda owners, the commercials, or whatever, I'm going to try Mobil on the wifes 03 V6 Accord. It's got about 40K on it. I've done UOA's on it with the 5W-20's and have really great results, short of the oil shearing down a little more quicker than I'd like. Also the wear numbers are just a tad higher than other V6 Accord owners using M1. Need to keep the car until **** freezes over because I got another kid coming, scratch the Porsche and new boat..... My question, which Mobil 1 should I use? I'm leaning towards the 5W-30, a little higher than the 5W-20 owners manual suggestion and it's pretty common down here in SW Oklahoma. But, I've read too that the 5W-30 is a "thinner" 30 weight and not much difference than the 20 weight. What about the 0W-20's? Or maybe the 10W-30's??? Right now I'm running 5W-30 dino in it and seems to be fine.