Good to hear, that's the opposite of what I expected. I expected the city driving to be unchanged as aero does not come into play. But on hwy I actually expected reduced economy due to increased drag in the bed.Picked up about 1 MPG when I installed mine - really helps on the hwy, not as much in the city.
Mz, I have a tonno pro rigid and it really doesn't affect mileage for me one way or the other. YMMV, literallyI measured MPG in city stop and go traffic a few days ago and averaged ~16mpg for that portion of the tank (done the old fashioned way - filled up, set trip computer, drove 60 miles or so in the city over a few days and then topped off and divided trip mileage by gallons filled). 2016 SV V6 KC Automatic transmission, 4x2.
In researching mid-sized pickups, I learned that we buy these vehicles for the size and NOT for fuel savings - the newest breed of full sized pickups get similar fuel economy as the current breed of mid-sized pickups.
I am planning to add a tonneau cover over the coming weeks or month - we will see how that affects fuel economy.
I fully agree, I track all of my spending, fuel accounts for 4%. Sounds like OP's truck has an issue though.I have stopped keeping track of my gas mileage on my truck. I find it is less bothersome to me if I am not sure how bad it is. I bought an Altima and drove it a few months but then my mother in law wanted to buy it from me. I was pretty happy to go back to driving my truck even if it is a gas hog. People worry too much about gas mileage. The actual cost savings you get by driving something good on gas is not really that big unless you have a very long commute. Most people might save $50 per month by switching from a truck to a economy car. Just take the family out to dinner one less time per month and you are even.....