Well I just picked me up a new daily driver/work car. I have used M1 40w and now M1 5w40 TDT in my LT1 from the recommendations on here. Difference is the Firehawk was driven from point a to b/driven hard. GTO won't be driven AS hard but I'll be using it to go see customers so it will be doing a good bit of city driving, stopping, starting back up multiple times. Will these oils do well for that? Previous owner has been using 5w30 M1 which is what is written on the cap.
Here are a couple of pics. Picked it up in North Carolina and its been great so far. Love being back in a 6 speed again. 99 camry was driving me crazy.lol
Here are a couple of pics. Picked it up in North Carolina and its been great so far. Love being back in a 6 speed again. 99 camry was driving me crazy.lol

