Last time I was over at Wal-Mart, I noticed they had 3 different versions of Mobil 1 5w30 on the shelf. The regular version, the Extended Performance, and Truck & SUV.
I also noticed that only the regular and EP meet GM 4718M, and that the EP and Truck/SUV met another GM spec that I'd never heard of before (6970M, IIRC?). What is that specification? I know 4718M is Corvette spec, but this other one I'm not familiar with.
What's the difference (if any) between these 3 versions of what appear to be the same basic oil?
What would be best in a higher mileage Dodge 4.7L V8?
Right now I'm using M1 SuperSyn that I stocked up on a while back when it was on sale. No complaints whatsoever. I typically run 5000 mile OCIs, though I could probably go longer. Dropping it at 5k relieves some mental anxiety of leaving oil in the engine for such a long time.
I also noticed that only the regular and EP meet GM 4718M, and that the EP and Truck/SUV met another GM spec that I'd never heard of before (6970M, IIRC?). What is that specification? I know 4718M is Corvette spec, but this other one I'm not familiar with.
What's the difference (if any) between these 3 versions of what appear to be the same basic oil?
What would be best in a higher mileage Dodge 4.7L V8?
Right now I'm using M1 SuperSyn that I stocked up on a while back when it was on sale. No complaints whatsoever. I typically run 5000 mile OCIs, though I could probably go longer. Dropping it at 5k relieves some mental anxiety of leaving oil in the engine for such a long time.