Ok guys, I'm new to the forum so take it easy on me. I have a 3.8L Buick 2000 Regal no SC. I have always run Syntec, but just put M1 10-30 in. Too bad I don't have any uoa's to offer. I love both, but I know I'm wasting money since this engine is so easy on oil anyway. I traded my old Buick with 200K (still going fine) with GTX 5-30 it's whole life, so I know syns aren't necessary for me. I put GTX 10-30 in once, but things weren't as smooth (noiser). I also like the easy starts at our occasional zero to 10 below F. Please help me to save some money and convince me not to run M1. I need help. Still have 5 qts. of Syntec (maybe I'll do a uoa for info). I've read this forum a lot and I know Syntec isn't well received. M1 has become cheaper here believe it or not anyway so why bother, but I like both. Please convince me to run a low $$ conventional. What works for you??