You want to use the thinest oil that is thick enough to keep the oil pressure up, without an oil pressure gauge that is hard to tell, but I figure it's time to go to a thicker oil when my car starts to burn much more then a quart of oil between changes, I've only used 20W 50 in one car and that was because it burned a quart of oil every 300 miles.
So I would say that unless you are more the a quart low when you go to change the oil then stick with your normal oil, if you are half a quart or less low then try something thiner.
Quote:
Originally Posted by Domman56
i'm wondering what is the lowest viscosity i should try on my car
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