Quote:
Originally Posted by biker1
What does your owner's manual say? I am guessing that is says to change the oil at least once a year. I generally prefer to follow the recommendations of the people who designed and built the car. Many cars have a oil weight recommendation, such as 0W-20, that essentially requires a synthetic.
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The 10K, 1yr recommendation started when that was required for the mfg to get energy credits. The car is designed to survive a 3-4 yr warranty period running that oil change interval.
If you want to keep a car +80K mi, due to tighter tollarances and smaller oil passages, the experienced mechanics recommend not to go more than 5K mi without an oil change. Especially with the higher MPG 2L turbo engines.