Reply to How often do I need to have the oil changed in my car?

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[quote=Anonymous][quote=Anonymous]10,000 miles w synthetic.  Changing every 3000 is bs just to line the pockets of mechanics with easy cash. [/quote]

If an engine sees almost exclusively highway use, I might consider going to a 10k/mi interval, but ONLY after having used oil from that vehicle lab analyzed, and making absolutely sure I stayed with the same brand and grade/weight oil. Ideally down to the same lot number, which would necessitate buying a substantial amount of oil in advance.

But every customer’s engine I’ve ever torn down after a failure has shown evidence of both oil contamination and oil sludging, from short trip driving and longer than recommended change intervals. In DOHC engines with variable valve timing, the oil sludging is particularly dangerous, because the lifters and valve trains are controlled by oil pressure, and the actuators have tiny oil passages that are easily blocked by sludge from old oil.

Do what you want…. But I make wayyyyyyyyy more money putting in remanufactured engines or cylinder heads than I do on oil changes.

Your choice.  [/quote]

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