5w-40
I just got the last six bottles of of the Mobil 1 5w-40 Truck and SUV in our Wal-Mart for $4.50 a bottle (normally $5.52). I'm not usually that lucky. It was in the clearance section since they are displaying the new 5w-30 Truck and SUV now.
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It's not bad to switch back and forth but why would you want to? If you run synthetic you can leave it in for longer, so you don't need to be wasting time changing oil and can spend more time driving.

If you do decide to go with dino oil, go with 10w40.

If you do decide to go with dino oil, go with 10w40.


