the real test would be to see what's he's getting on the highway. he might want to check into a tuner.
1985 silverado 6.2 Diesel , Bought new then, traded it in 2001, 25 MPG city or a 2500 mile vacation trip.. actual and not avg MPG. day in and out. dual 20 gal tanks. gas dodge had since 2001 14 mpg hwy and 8 when pull camper lolo, its a MAGNUM not a HEMI lolo..
Fastbass Marine LLC
We specialize in NEW and USED ALLISON BOATS, Blazer Boats, Platinum Mercury Marine Repower Center, AquaTraction Flooring, and custom marine electronic installations on beautiful Kentucky and Barkley Lakes.
2022 Allison XB-21 BasSport Pro Elite
2022 Mercury 450R
2012 Bullet 21ss
2005 Mercury 300X
https://youtu.be/FOnAGNWOgZ0
This is a misnomer that gets tossed around a lot. The fact is rolling resistance, larger mass and weight reduce mileage. Not to mention the effect of driving down the road lifted increases air resistance. Without recalibration of the computer the on board computer will show much better fuel economy.
2024 Phoenix 818, Mercury 175 (3B414035) Trick Steps, 3 Garmin 106 SV,s, LVS 34. BoatEFX dual bow mount. Ionic 12V 125AH, 2 12V 100 ah LiTime’s for the TM. Minn Kota 345 PCL charger,
I can get about 17 mpg on the interstate in my 2012 duramax at about 85 mph. Around town is 13 to 14 and pulling on the highway or city seems to both be around 13 or 14. To those saying they get mid 20s out of these newer trucks are full of it. I can make my avg read what ever I want to on the dash. It's all about hand calculation to be true. Also my truck is deleted and tuned. Honestly I didn't see much mpg gains from deleting
2014 Chevy 2500 4x4 Gas. 11-13 mpg. Interstate 13-14.5
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I average about 13-14 with my 16 LML. Cruising on the highway @ 70-71 I can get around 20
2018 duramax 4x4 double cab longbed.
There is so much difference between drivers and a little bit on trucks that mileage is not a deal breaker for me on a truck. If I drive like a little old lady then I get 20 with my trucks and that rarely happens! A buddie brags about his mileage all the time, I cant stand to go that slow! The worst truck I had was a GM 6.0l. 13 on the highway and 3 plowing [not a misprint] The best was a GM 5.7l 18-19 on the e-way and 8 plowing. If I drive slow enough the diesel does better than all of em but what fun is that! cj
2002 X19 200HP OX66 HO Vmax,HPDI lower, it lives, thanks Hydro Tec.
Consumer report showing MPG for 4 heavy duty trucks.
https://www.consumerreports.org/pick...-fuel-economy/