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Originally Posted by rjstaaf  Fact is if you are doing 3K-5K oil changes ALL of this discussion isn't worth @#$@# because any cheap conventional oil WalMart happens to have on sale will go to 5K easily. |
I'm not convinced this is true. I'd been using Mobil 1 products for years, with excellent results. My old Pathfinder had 215K on it when I traded it, and was clean as a whistle inside. Compression, power and economy were the same as the day I got it (at 68K). Both my current cars have over 174K on them, and I've used M1 exclusively with 10K oil change intervals until recently. Both engines are varnished up inside. I broke a timing chain at 164K in my VW. That's what got me looking at BITOG. I did an Auto-RX treatment using Rotella T 5W40, but now I'm experimenting with different oils and sending samples to Blackstone. The more I read BITOG the more confused I get; it's information overload I'm afraid.
I think the engines in my garage today are harder on oil than what I'd owned in the past. Some of the new direct injection engines are much tougher still. My VW sees 6000 rpm every day. It will take a lot of oil analysis before I'm comfortable exceeding 5K OCI with a synthetic.