Using ATF To Thin 10W30

[DavidLang]

I forgot to tell my wife to pick up 5W30 for my last oil change and they gave her 10W30 instead. It is Mobile 1 extended. I knew better but was in a hurry. Can I thin it with ATF or should I start over using the right stuff? The head is starting to rattle a bit especially when cold. 2000 Metro, Auto, 160,000 miles, runs strong. Thanks for any and all replies.

[Crvett69]

don't mix it, atf is made for different purpose than motor oil and has other additives in it

[91Caprice9c1]

yeah, i'll agree, it's not recommended.