The best mid-size truck for 2019? Honda!
2019 mid-sized test There is a lot to like about each one but also a lot to not like. None of them make me want to trade in my 2008 Ranger for running errands around town. A big chunk of that is...
Forum Discussion
Bionic Man wrote:
Shiner, I know you’ve mentioned that your Cummins is tuned. Is your Bimmer the same?
If so, it is a given that the computer stated MPG in your cars will be off more than most.
I’m not saying that the computer is always dead on accurate with factory tuning, but it is closer than with an aftermarket tune.
I also track all my fuel use in an app. On my old 03 CTD the computer was always within 1 MPG prior to tuning with a Smarty Jr. After that it was up to 3 MPG off. My 2012 is reasonably accurate - but only for a rolling 300 or so mile range under similar driving conditions. So it’s accurate on long trips for an OEM tank.
I deleted and tuned the BMW around July 2018 so you can see the difference in the graph. Deleting and tuning the car didn't really make that much of a difference mileage wise as it did in my truck. My truck got a little more accurate after a tune.
