3rd tank, stock Canyon A-T, almost entirely city driving in Silicon Valley. 22.8 MPG. Of concern (or perhaps not) is that my DEF is already at 27%.
How fast am I supposed to use that up?
If properly filled up your DEF should be lasting 6000-7500 miles. You are doing city driving so yours would be lower but still not only 3 tanks worth. They didnt fill it up at the dealer. You can go complain to them or...
Go to Walmart and purchase a 2.5 gallon jug of DEF (only like $12) and use it. Try not to purchase any more though. The dealers are supposed to top off DEF during your 2 oil changes.
Have seen some high 20s and low 30's on easy country drives on the 25 mile counter. I decided to let my "B" tripmeter run since driving off the dealer lot, and plan to let it run for the life of the vehicle. Only 1,300 miles on the truck, and sitting at 23.6 mpg at the moment. Mix of suburban and highway driving, and I have a heavyish foot on take off, feathering it a bit through 1st and 2nd gears, then roll that puppy in once it hits 3rd and has a load to pull against, then cruise - wash, rinse repeat. Seating the rings, that is my excuse. Really just digging the torque.
Despite my not trying terribly hard to get good mileage, the truck gets better fuel economy than my wife's car. Really enjoying having and eating this cake.
First time I have had the truck out for an extended highway trip since the day I picked it up and drove it about 350 miles from the dealership to my home. The trip below was roundtrip Raleigh, NC to Damascus, VA, through the Blue Ridge Mountains, carrying about 900 lbs of passengers and cargo, including 3 bikes on the back. Avg speed was around 70MPH so I was pretty happy with this MPG. Am guessing that having the bikes on the back probably gave me a slight hit. 2016 Canyon SLT, 2.8L, 4x4. Truck is factory stock from a mechanical perspective. My normal driving is 80% or more city. Fuelly link below shows current lifetime MPG info.
2016 GMC Canyon SLT: CCSB 4x4, 2.8L Duramax, Summit White, Bull Ring side wall anchors, AMP Research Powerstep, Rugged Cover Tri-Fold Tonneau, WeatherTech Mudflaps
Mileage calculations will vary depending on how fast the tank is filled, how much the fuel foams and of course what you are doing with the vehicle. My overall records are posted below as are the 450, 50, 25 max DIC readings from a recent trip.
My minimum tank calculated 17.91mpg while the prior tank calculated 30.96mpg. I suspect a fast or incomplete fill. The highest overall tank was 34.15mpg.
Overall is 24.49mpg over 8770 miles
The last couple tanks were 28.3ish
Max 450mi is 30.1mpg
Max 50mi is 40.1mpg
Max 25mi is 51.5mpg