zmanzbo

I accidentally bought Mobile 1 5w-30 at Costco, they didn't have 5w-40. Should I still use it?

Thanks!

azinn

I would still use it. Just keep an eye on the oil level if your worried about it and get the correct type next time. Should not be a problem. My 2 cents.

benzeboy

I will go with OEM recommendation especially if your vehicle is still under warranty. BTW the last numbers on the engine oil is important, if you were to use 0w 40 you may use 5w 40. I will not substitute. In a much older engine I might go from a 5w 30 to a 5w 40 but not the other way around.

RobertG

why dont you just return the 5w30 that you bought and buy the correct weight.

MBfan89

hey what abt 10w 30 or 5w 30
or a 0 w 40 what is the diffrnce and what is stock

azinn

http://www.whnet.com/4x4/oil.html

auto art

FYI i just bought valvoline full sythetic 5-40 and it rea that it meets MBds 229.3/229.31/229.51 FOR .99 after rebate at kragan auto parts