Quote:
Originally Posted by absentmathis
Wow 5k? That's excessive IMO. I'm a maintenance nazi but with modern day synthetic I see no need for that unless its subjected to extreme conditions. My e39 has 230k and runs as clean and smooth as any. Oil changes are 7.5-10k.
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Yes, every 5000 miles. Every mile on new oil means it is not as good as when it poured from the bottle. I say at 5000 miles, it is a small investment to change the oil and filter. I am not saying anyone should do the same thing but there is no way to know if it is obsessive. There is a way to know the oil was not as good coming out as it was going in even after as little as 1000 miles, including synthetic.