My buddy picked up some t5 10w40 at tractor supply on close out because they are changing to the 15w40.
He only got 2 gal. Can he mix it with t5 10w30? 9qt. 10w30 and 4qt. 10w40 for his diesel truck?
Or use it for chainsaw oil it was 9.99 a gallon.
He can mix it just fine.
It's All Rotella T5 correct?
If so, that's even better.
I know more than one person who runs 15w40 in their diesel in the summer and 5w30 in the winter around here.