Quote:
Originally Posted by optiontrader
Everytime I do/see an oil change, I see the mass of black liquid coming out; regardless of the interval, I'm sticking to 3750. At 3000+ miles, the oil's pretty dirty; I'd rather take that crap out than continuing running the engine past that. 
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Color of oil is actually NOT indicative of how well it's working...
Only way to know is a oil analysis.