Rotella 5w40 in Ford Ranger?

Messages
733
Location
Kansas City Metro
I am thinking of switching oils and Rotella is what I would like to run. The thing is, my owners manual calls for a 5w30 weight oil. It is a Ranger with the 4.0L SOHC. Where I live in Nebraska, we get temperature extremes. It can be 100 degrees in the summer and it can be below 0 in the winter. Is that 40 weight oil at operating temp going to be too heavy? Is anyone else running Rotella T 5w40 in there Ranger? Thanks!
 

OAS

Messages
121
Location
NM
I'm running RTS in my '90 Bronco 2 2.9v6. I used to run it in the winter and Mobil 1 10-40 HM in summer. But the RTS seems to do very well year round. (even in the NewMexico desert heat.) Use the RTS and sleep well at night! :-)
 
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