Oil change time

[reaperman]

I know a lot of diesel owners automatically put 15-40 in their machines. But my concern is in the winter time 10w-30 is more suited to a Minnesota winter. And 15-40 just seems to be a bit thick when it dips below zero and its time to plow snow. And 10w-30 can handle temps into the mid 90's during the summer. So I should be ok to feed my machine 10w-30 year around, right?

 

[donald73d]

Rotella T6 5W40. Cannot get much better oil.