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26.5 mpg over 700 miles mixed driving

8548 Views 18 Replies 11 Participants Last post by  Haulin
I purchased my truck as a demonstrator so it already had 5300 miles on her. After driving 700 miles mixed with about 60% city and 40% highway, I'm averaging right at 26.5 mpg. The EVIC was very accurate on the first tank of fuel showing 26.5mpg compared with 26.4mpg calculated. I'm averaging close to 27 on the EVIC now with the second tank of fuel. I would say I've taken it fairly easy over the 700 miles with driving aggressively only a few times. It definitely sucks down some fuel if you get on it regularly and I could see dropping below 20mpg in the city if I drove it hard.

I have a 2wd Laramie Longhorn with 3.55 gears.
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Well, I did the 210 mile trek again yesterday, & my average is up to 25mpg now. I'm not doing any stop & go until the very last 2 miles off the interstate. I used the cruise as much as possible, but I didn't notice the weirdness of speeding up. It was very smooth.
One thing I did notice that I thought was weird on the mpg EVIC is that the display is not proportional; i.e. going uphill displays 10mpg, but going downhill displays 80mpg! That was just weird.

If I am understanding your statement correctly, the EVIC should show lower mpg going uphill than when going downhill. If fact with most fuel injected engines, the fuel is cut off when coasting downhill.
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