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Originally Posted by MrSelfDestruct
The problem with time is that crankcase blow-by gasses accumulate in your oil and it starts to become acidic. It may look perfect, but it's slowly eating your engine.
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Blowby consists of combustion byproducts (soot, water,...), unburnt fuel, and engine wear material, with soot (the black stringy part of dirty oil) being the greatest contributor in a healthy engine. If blowby were an issue in this engine at those miles then the oil wouldn't appear new. There could be other contaminants seriously messing up the chemistry but problem blowby is very visible.
If there's fuel or water contamination it wouldn't necessarily be visible. A leaky injector or poorly operating carb can dump lots of fuel. Lots of cold starts and no highway running can add lots of water. By 2000miles it may have used up the add package and the oil could easily be out of viscosity range even if it looks & smells fine. Delo 400 or similar "C" diesel oils handle these situations well but the average dino SL rated oil would probably be dead.
Bottom line, it depends.
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One a side note: I work at an oil-change shop, and I laughed at the idea of someone telling you that you didn't need a service performed that you wanted. We'll push stuff at you if there's so much as a speck of dust in fluids, especially if it's beyond the reccommended service interval.
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Agreed. The guy was either stubborn or unusually ethical.
Edit: typo from hell