Quote:
Originally Posted by Graplr
I had my wife's 98 Avalon's oil sent out to Blackstone when using M1 5w30 Synthetic at around 5500 miles. They recommended a 5k change so I switched back to dino M1 5w30 and am shortening the interval to 4k. The large extra cost for syn didn't seem worth it to me if I couldn't run any longer OCIs. I had the same logic in my mind when switching the Avalon over to syn but it seems her car can't do 10k OCI.
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Interesting, and thanks for sharing. So maybe I'll stick to my current 5K interval with dino? The only way to be sure would be to send a sample in to Blackstone at 5K and see what they say...