View Full Version : question about oil weight?

02-25-2006, 03:51 PM
I was wondering what is the best weight of oil to run in a car 10w-30, 10w-40, 20w-50,I was told that the thicker the better is this true?or could thickness cause a problem?I was thinking of 20w-50 cause if its thicker thats less heat friction being made right?and the pistions would be able to flow alot better right? or am i wrong?

02-26-2006, 10:03 PM
I'd use what was reccomended in the specifications for your car :)

Safest that way.

02-27-2006, 07:11 PM
Use the kind that's recommended in your manual. I would say a 5w-30 if it's below freezing where you live and a 10w-30 if it's above.

You see, the thicker the oil, the better it protects, however, if it's TOO thick, it can't get to all the parts it needs to protect (especially if it's cold outside). If it's too thin, it can get everywhere, but can't protect the engine well enough.