*chuckles* These chromosomes are just fine, unlike some others whose are apparently bent. Just for reference, cause some can't seem to grasp the fact that it IS possible (kinda like my 250 dirtbike being able to grab over 100 mph), I started off with using the readout on the dash, cause it was put there for a reason. Hand calculations came into play as well, but hey, why not try everything, right? Ok. So when I got the truck stock, highest reading on the dash read 19.8 MPG (that is US gallons, ok?). Pre-tuned ECM plugged in read best number of 24.8 MPG. Now with the DPF delete programmed in and the full MBRP exhaust in, reading is 25.7 (I only drove it the once with this system in place).
Now with the hand calculating, I factored in the conversion from your American gallon to the Canadian one. Hand conversion stock ECU came to just under 24 mpg (remember, now it's in Canadian gallons NOT US). Pre-tuned bumped it up to 29. With the full DPF system/delete, I'm just under 31.
1 Can gal = 1.20 Am gal, just to put that out there. I also hand calculated the amount of fuel put in, and with GPS the amount of miles put on. I do this with all my vehicles so I can see if there's a fuel drop or gain, depending on what I'm running. One has to remember as well, that right now, at least where I am, we are running winter diesel which takes a nasty cetane hit. I'll be interested to see when the summer fuel comes in.
So that being said, numbers don't lie. It's sad to see that chauvinism has come into play in this thread, because more times than not when a girl says something it just HAS TO BE WRONG, and the guy is always right. I'm not a feminist by any means, I give credit where its due...but really, to play that card Killerbee, come on. I thought you were more mature than that. Oh and just to make it more interesting, I had a MALE friend come up with the same numbers as I did. So much for your chromosome theory, honey.