Quote:
Originally Posted by RichieHPS
In real life, oil begins to age literally from the moment it moves from a sealed canister to the engine mazes. Its oxidation begins, accelerated by constant heating and cooling, detergents leave, dirt accumulates.
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Actually, per Blackstone (used oil analysis firm) interview I saw on YouTube, oil does not wear from age. It wears from use. When asked if you should change your oil annually on a car driven perhaps less than 1,000 mile per year, the answer was clearly a "no".
Basically he said oil changes are not time based. Oil changes are dictated by use (mileage). Of course how many miles he's going to say is determined by used oil analysis.
What is interesting when you follow the used oil analysis threads on bobistheoilguy.com, is that some cars and oils, can go significantly longer than specified by the vehicle manufacturer, and some less.
It really depends, you cannot make generalized statements.