Originally Posted By: Red91
KenO, do you know who is blending what you have access to? I ask because the ACDelco oils we use from time to time has been Shell, Mobil, Phillips and Smitty's Super S. I'd imagine at the moment, you are probably seeing a Phillips product, and I wouldn't hesitate to use it. I don't think you can buy a bad 15W-40 stateside, and if it's Phillips, it's going to be similar to their Guardol product.
Not sure, but most of it doesn't look like Mobil bottles anymore. Phillips seems to be the general consensus lately though. The AC Delco Dex IV is dirt cheap though, I've got about 6 gallons of it on the shelf at the moment.