How's your MPG?

My Impala is a 2014. Probably the same engine, whatever the largest is. I get lost when it's not a 350, 400, or something like that. It gets upper 20's around town and on long trips at 80+ I averaged 33-34 MPG.
Like you wrote the real average is closer to 30 highway. I use nothing except the lowest priced regular I see. I don't worry about it as long as it's better than my ex-truck at around 15-18 MPG.
For years I'd tow an RV and with anything I drove and got 9 MPG. Gas was cheaper and I made more money.

 

I hate to put the Mercedes away for the winter since I average 8-8.5 L- 100 km. and with being able to get diesel at 90 cents a litre verses $1.24 litre for gas to power the Magnum which gets worse mileage but I guess I'll just have to suck it up until spring arrives and I can bring out the old coal burner and it's new partner.

 

1988 Olds Custom Cruiser
Autobahn: 22.4 mpg as the best value (no headwinds, no idiots on the rear bumper)
Average: 15 mpg

2006 Daihatsu Terios 4WD
Average: 26.7mpg