I use the Fuelly app for my personal vehicles.
Here is my 2012 Honda Accord real world fuel use from the last 6 years of use, I started using the app in 2017.
Naw, man. I just look at the screen. 2017 Camry 2.5. Lotsa short trips urban driving about 20. Highway at 65 about 35. Michelin Energy Saver tires 35psi.
96 Chevy C1500 4.3 vortec NV3500 5 speed 3.08 gears went 612.48 miles on 31.9 gallons on Marathon 87 E0.
19.2 miles per gallon is pretty good. I travel 45 miles round trip to work all rural open roads no interstate.
The Forester is entirely used locally these days, and its fuel economy suffers for this. When used as a commuter prior to my wife's retirement it would get over 30 mpg in warm weather conditions.
HAH, 312 miles on 5.4 gallons, 57.8 mpg. No highway, AC used for about half of those miles.
Even better, happened to have seen a BP at $2.99, so less the .15 discount you get with your BP Visa, paid $2.849/gallon.
Durango V6 on the trip from Metro Detroit, Michigan down to near Oak Island, North Carolina, two fuel stops. Four passengers, luggage, etc. Curvy mountain hwy through W VA & VA. Outside of that ran between 70-75mph.
just turned 1K miles on my new to me in June of this year 2005 GMC Yukon Denali 6.0...second about 100 mile highway trip and second time I've seen about 18 MPG highway...above the listed estimate for highway mileage of 17 MPG highway...not bad for this big SUV