Member, Sport: On DSC: On (>100 posts)
Join Date: Mar 2002
Location: Austin, TX
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Is it ok to mix 5W-30 and 10W-30?
Yes, yet another oil question for the board.... sorry. Anyway, as temps are heating up, I'm curious if i can add 10W-30 as the Beast needs it, even though the engine has only seen 5W-30 since it was new last summer. I currently have 6K miles, and have not yet had my first oil change. I've added 3 quarts of Mobil One 5W-30 since the car was new.
I would probably stick with 5W-30, except I'm moving to Austin in a few weeks where summer temps will be equivalent to the surface of the sun.
I don't want to re-open the whole 5W vs. 10W debate, I just want to know if there's any problem with mixing different weights before the first oil change. I wouldn't think there would be. Thanks for any input guys.