Fuel Economy with 5300 DOD

[SBK]

What kind of average fuel economy (indicated on the display) are you folks seeing in real-world usage with the DOD-enabled 5300 V8?

I was pleasantly surprised that our new '06 is pulling 18.9-19.2mpg in regular commute/local use. I reset it for a ~1100 mile weekend trip and saw 20.3mpg average across the full trip including some running around in the mountains of Kentucky.

This is on a 2006 Envoy Denali with 5300 DOD and 3.42 axle. We've got around 3000 miles on it at this point, so it's starting to get broken in.

[phewop118]

My parents have an 05 tb ext v8 that gets only about 15 mpg when my mom's driving. But when I drive, I can manage 20 without a problem.

[zamar]

Just Curious. What were you getting mathmatically? Miles Driven / Gallons.

My computer seems a bit generous. My wife drives it most of the time so I have not compared it myself.

[SBK]

Just Curious. What were you getting mathmatically? Miles Driven / Gallons.
To be honest, I have no clue. :duh: If I can remember (I'm a F.O.G.), I'll try to do some "real" calculations.

[phewop118]

I don't have the driver information center, so these are my calculated numbers, estimated based on 20,000 miles of driving and miles per each tank. If i'm verrrrry easy and careful, I can get average least 22 mpg on the highway.

[bluenvoy03]

im sure with the V8's they put smaller rear-ends to compensate for better gas mileage, because they are 3 different rear-ends for our trucks (3.42, 3.73, 4.10)