Q-1 IFTA shocker!

Really? It’s harder for a truck to move through colder dense air, it not rocket science.

 

I was referring to engine performance, so yes really.

 

Performance? Yes.
Fuel mileage? No.
Just as he referred to in his last sentence.

 

+2 for the Fuel Guages app. I don't pay for any other services, the app is free. I use it for every car I own nowadays but always, always on the truck.

For those that use DEF add another truck to your garage and track your DEF with it.. This can tell you alot. When your DEF mileage jumps around you know you have trouble coming with an emissions truck.