quote:They sell a conventional, a blend and a full synthetic, but the most commonly used one on here is the Supreme 7000 blend series.
Originally posted by Quattro Pete: Shaeffers probably could, but I forget if it's dino or a blend...
quote:I assume you are talking about "domestic" makers or those you have knowledge off. My friend had an Avalon that beat up Mobil 1 in relatively short oci's. That was his only solution, syn and short oci's. I like to see a proven track record before I trust the manufacturer. This is such an engine dependent question, there can't be a universal answer.
Originally posted by salesrep: Engine manufacturers recommend drain intervals after their battery of tests and then cut it in half knowing people will put cheap oil in or not change as frequently as they should. Thus a good dino would have tested out at 6k or 7k for them to arrive at a recommended 3k oil change.
quote:Yeah, I saw that one. I like GTX, but never felt like it could go as far as some others. The uoa's seem to be proving me wrong. Heck, I can't bring myself to run Mobil 1 that long.
Originally posted by Virtuoso: There was a UOA posted a little bit ago using Castrol GTX 5w-30 in a Toyota truck (correct me if I'm wrong), with 7,300 miles on it. And the results were pretty **** good. They were mainly highway miles, and in an engine that's probably pretty easy on oil. I would NOT run any dino in my car for that long though.