Quote:
Originally Posted by Ecky
Perhaps you had a malfunctioning EGR?
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It could be possible, but it is good piece of mind to buy cheap all-synthetic motor oil and change it every 3 months. Yes, they can specially formulate it and make the claim that it protects for 10,000 miles or one year, but knowing that the motor oil is going to be mixed with that much time of gasoline and carbon deposits altering the chemistry of the motor oil, I really don't feel comfortable going against the manufacturer's recommended oil change interval. I have learned a lot from the mistakes I have made and often times I was proven wrong, keep it stock and follow the owner's manual!