Well, there is always 0w-40 M1. 10w-40 dino might not be too bad either. Clean 7500 10w-40...nothing wrong with that. Another consideration is 5w30 HM oils like GTX, 12cSt with 5w CC is a good product. Since you car is NA, I'd say be more flexible. Even ST Synth 10w30 HM is worth a shot, I thought it worked good...A3-rated. When summer comes, synth oil is a waste of money when you could use a 15w40 HDEO.