Mixing M1?

[RichR]

I hoarded a close out a while back.I have old Tri syn and SS versions.Can these formulas of the same viscosity be mixed with no adverse effects?
I am thinking of using for winter then going back to Dino.
RichR

 

[GROUCHO MARX]

Go for it.

 

[buster]

Mobil 1 and Amsoil are compatible with each other, dino oils and other viscosities of each brand. Mobil 1 in particular is fully mixable with each viscosity and Amsoil is too however, not all Amsoil viscosities use the same chemistry so extending drains is not recommended.

 

[GROUCHO MARX]

Ive changed my mind, send that M1 Tri-Syn to me. It will hurt your car and I'll make sure you don't do that!