Quote:
Originally Posted by tygman
can someone explain to me the difference between 5w40 and 15w40 . Why is 5w40 double the price?
Also which is better considering my car is a big oil burner. I can't find a leak anywhere - it doesnt leak- just burns oil like a monster. Would a heavier oil be better in this case?
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How much oil does your car burn? Might be time to start looking for a long block. You do know about 3.5L 603's rod bending problems correct?
Synthetic costs a ton more, because its more expensive to make. But its less affected by cold temps so it starts better in the winter.