[HarveyW]

If you aren't figurine you mileage by hand then you really don't know what you mileage is. The onboard guesstamator is doing just that, guessing at what mileage you are getting.

 

[ballisticexchris]

If you aren't figurine you mileage by hand then you really don't know what you mileage is. The onboard guesstamator is doing just that, guessing at what mileage you are getting.

It's really hard to get accurate without knowing the temperature of the fuel. That being said, Hondas computer is close to dead balls on. I have checked it against a calculator, using the same pump and about the same time/temperature. I'm within .08 - .3 mpg consistently compared to onboard computer. That's plenty close.

 

[jasonpp]

Realistically, I could never reproduce 40.3 mpg again unless all the planets are aligned but I do make an 80 mile, all-interstate trip regularly and I very often get over 30 - 34 mpg in one direction. It has everything to do with the wind resistance. I still remember how hard it was to pedal a bike against the wind then coming home would almost require no effort.

I definitely can but it’s not going to be on flat ground. It’s what it is. I don’t know why people think one’s MPG will apply to other’s. People live in different kind of traffic and terrains.

 

[HarveyW]

It's really hard to get accurate without knowing the temperature of the fuel. That being said, Hondas computer is close to dead balls on. I have checked it against a calculator, using the same pump and about the same time/temperature. I'm within .08 - .3 mpg consistently compared to onboard computer. That's plenty close.

AAA tested a multitude of vehicle makes and models and this is what they found. On average, the fuel economy display of the vehicles tested showed an error of 2.3-percent. But vehicle error varied greatly, ranging from 6.4-percent to 2.8-percent.

The average person spends $3000 on gas per year for their vehicle. Put pen to paper on those two things and you will see how that lack of accuracy may cost you.

 

[louierg]

With our new 2022 PP, when we reset the trip odometer after filling up, it also resets the fuel mileage display. I believe our 2014 CRV kept going and did a "life time" fuel average. So recently we filled up and went on the highway right away with the average fule mileage showing 12.2 or something. The readout started going down, until it reached 8.8 L per 100 KM. This is 26.7 US GPM or 32 Imperial GPM. Impressive! This is with the cylinder deactivation but without using the Eco button. Picture taken by the passenger just after getting off the highway.
View attachment 17026

To get better than 24mpg on interstate highway at 70 mph is very good. To get better a tail wind is necessary. Driving habits speed terrain and air interacting determines mpg outside of vehicle performance.

 

[ares]

No it would be impossible even with 2WD. The AWD Passport switch to 2WD at higher speeds anyway. I can see maybe 1-2MPG better at most with 2WD but you can’t change aerodynamics with just 2WD.

There's still AWD drivetrain loss + weight. I believe most manufacturers show 2mpg+ difference between AWD and 2WD.

 

[ares]

It's really hard to get accurate without knowing the temperature of the fuel. That being said, Hondas computer is close to dead balls on. I have checked it against a calculator, using the same pump and about the same time/temperature. I'm within .08 - .3 mpg consistently compared to onboard computer. That's plenty close.

Respectfully disagree. My hand calculations differ least 1-2mpg from trip computer.

 

[BangBangBill]

I calculate my mileage every fill up. Changes in mileage may show a problem exists before the diagnostics tell you. My PPTS shows just under 1 MPG better than calculated. I don't baby the throttle at all but don't rally race eaither. I'm around 22 mpg on average.

 

[gd3Fit]

I’ve tracked 30,186 miles on the Passport with Fuelly using the same fueling method. The actual mpg is always about 2mpg lower than what is shown on the trip. I’ve also spent about $5000 in fuel. Oof.
21.1mpg avg overall

 

[kgilbertsen_1]

With just over 9,000 miles since mid-July my '22 EX-L AWD has averaged 22.8 per it's computer vs just over 22 using Fuelio. Pretty close.

 

[ares]

I drove the PP to work all of last week - which is rare. I would say something like 55% fwy and the rest city. FWY driving is between 65 and 75mph. There may be an occasional person who drives 60 on the single-lane HOV. I would say about half of city driving is 30-40 and the other half 45-55ish. My freeway area does have a lot of bridges so rise/dip/hilly is pretty normal.

358 miles @ 19.8mpg according to fuelly. ECO mode was disabled during this tank of gas. IIRC, revs were always kept under 4k RPM and low-gear shifts were around 3k rpm and the rest shifting less than that.

I'm going to have ECO mode enabled next time I drive her for a week to work. Hopefully not anytime soon as the $55 needed to fill her up made me tear.