Hello All, As you can see in my sig below, I've got a 1990 Corvette with the first generation small-block Chevy 350 in it. I'm the third owner of the car and I can tell you that it has seen nothing but M1 5w30 since it came off the assembly line in late '89, at least up until I owned it. I was running Redline 5w30 for the first coouple of years that I owned it, then Redline got to be more money than I was willing to pay for it. I then converted back to M1, same viscosity up until last year. I tried M1 0w20 in it and I really didn't care for it. The oil pressure is fine, but valve train makes more noise than I remember and I don't think it has the film strength to seal the pistons in the upper revs (engine is stock). It also seemed like it was burning some of that oil, so back to 5w30 for the old v8. I've been reading a lot on this forum about how good the Pennzoil synthetics are and I'm thinking about giving it a try. The car is driven daily during the nice months of the year, but does see some autocross and a little bit of drag racing at grudge night. I do not plan on changing the oil back and forth for the racing. Given this, what do you folks recommend? Thanks, Adam.