engine oil??

[chevymaher]

Van is garage kept and it does crank slower in the -25 degrees range when it is outside over nite because i using the garage. Durango is outside year round fires right up.
I had 230 thousand on the van when a oil cooler line broke forcing me to rebuild it. Parts were clean and looked like new so they must be lubricated well. It is the same engine now with 270 thousand. Bearings rings and gaskets. Durango has almost 200 don't use oil and runs strong. But honestly thinner would be better for winter. But I having incredibly good luck with anything i use this oil in. So if it ain't broke don't fix it.