Mixing motor oils

headviking · #1 (**permalink**) 06-07-2012, 11:40 AM

I am about to change my motor oil. Realized that I may be short about a quart of Rotella 5w40, but I still have some Mobil 1 5w40. Is there a problem in mixing the two.
I have used both in the past. I use what ever is on sale. This time it was Rotella T6.

**2006PSDSD** · #2 (**permalink**) 06-07-2012, 11:48 AM

I've done it before, as long as the viscosities are the same, I do it

atvrider93 · #3 (**permalink**) 06-07-2012, 01:00 PM

you're mixing a couple quarts when you change between brands anyway because of whats left over in the HPO system. Ain't gonna hurt a thing

headviking · #4 (**permalink**) 06-07-2012, 08:14 PM

Thanks. Then I am ready to go.

WLDHRSE · #5 (**permalink**) 06-08-2012, 03:16 AM

Even the viscosities don't really matter cuz they break down and change quickly with most oils.

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