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A few years back, consumers reports did a big test on oils, oil changes, and engine wear.
The short story is that they found no real need for the old standard 3,000 mile oil change. That running Any SAE approved oil 6,000-8,000 miles was just fine.
I have run Mobil 1 for 10,000 miles in a few trucks that I've owned...(5)...changing the filter (Wix from NAPA) every 5,000 miles + adding a quart to replace the one lost.
EVERY one was still running strong at 200,000+ miles...when I sold them. The rest of the truck was falling apart...the engines were clean and tight.
Tall Shadow
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