[quote author=biggee72 link=topic=152285.msg3362021#msg3362021 date=1255095754]
But John, just for the sake of argument just because the oil is "SERVICEABLE" why not spend the extra $30 and do the oil change sooner to protect an ever so expensive investment? Why try to squeeze ever last mile of of the oil? Even if it's still serviceable there are still contaminents (sp) and acids, etc in that oil. Isn't fresh oil better?
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I understand what you are saying, but if you got 200,000 out of oil changes this way, (which I did) why would you halve the interval? It's just not needed. After 200K on a car, I'm tired of it and it usually gets sold.
I'm truly impressed how well Mobil one works in engines. I have a 1981 Honda CBX, 24 valve, 6 carb, 6cyl AIR COOLED motorcycle which used Mobil1 15w-50 fully synthetic oil, from day one. The bike has 65,000 miles on it, and sees a 5K OCI. The engine is literally PRISTINE inside, you can still see grind marks on the cams from the factory, Mobil 1 is amazing stuff, I don't fear at all running it that way. And remember the bike has a 9,500 redline, and cruises at 65 mph @ 4500 rpm all day long.
I also have 4 cars on the road, and four motorcycles, I could certainly use more free time not changing oil. I just reached the opinion that if nothing is hurting my engines, why not? There are also C-5 Corvette guys out there with (daily drivers) over 200K on their cars, changing oil at the 12,500 interval, with tight, well running engines, modern oil is good stuff.
It's only Russian roulette, if there's a fear based RISK, I have COMPLETE FAITH in Mobil 1, and it's an earned faith built on confidence, and results, from long term use of the product.
John