when I got my d90 p300, I was expecting to get about 20 mpg in average as EPA rated it 18/21 combined 19.

I am currently on a road trip and the following are the mpg I got so far.

Westchester county NY to Hershey PA 26.7 MPG
Hershey PA to Laurel Highlands PA 24.7 MPG
Laurel Highlands to Sandusky OH 25.1 MPG
Sandusky OH to Rolling Prairie IN 26.1 MPG
Rolling Prairie IN to Chicago IL 25.9 MPG
Stock without any modifications
Factory Goodyear Wrangler AT
ECO modeAuto on/off deactivated
Slightly under speed limit or at speed limit
Back seats folded down fully packed with traveling gears and bags and etc.

Very impressed.

 

I have found the Eco mode makes a big difference. On a recent road trip I was getting around 22 MPG at high freeway speeds (80+) with it on vs about 20 without.

In general I get around 22 in mixed driving in my D110, but I live in an area with a lot of hills, so any local driving really negatively impacts. On a drive that I regularly take at steady 55 speeds that is flat, I get about 25 MPG. Also taking off roof rack/cross bars and not letting the tire pressure get too low (I keep somewhere between the comfort and normal levels) seem to help.

 

Glad to hear because my 90 P300 is terrible on gas. I attribute it to still being in the "break in" stage with only a little over 1000 miles on it. Combined driving, I'm averaging around 16.5 mpg.

 

I must be a terrible drive because I'm getting 15-16 mpg around town.

 

Because of the weight and aerodynamics, I think it is especially sensitive to driving input (acceleration, etc).

 

Mileage on my P300 D110 increased from 17/18 to 20/21 somewhere about the 2000 mile point. I tend to drive fairly economically, use eco on long trips (wish there was a way to set it to default to that rather than comfort) and get 18-22 on a range of trips and that's with the expedition roofrack, side ladder and raised air intake, and off-road tires. I'm hoping a fairing for the rack might get me another 2-3 mpg on longer trips too.

 

I took to heart your guys input on using ECO, so I used it for a while on my broken-in, 2020 P300 110. On the Interstate at speed, I could not tell any difference.

In town, it scared the absolute heck out of me, intially. I kept pressing on the gas pedal to keep up with the car in front of me coming out of a green light and the vehicle just would NOT move. I swore I must have been teleported into a Toyota and I was going to be rammed from behind by a shiny new, four- door pick up truck.

After a while more of suffering with the ECO logic, I gave up and went back to comfort or Auto. Life is too short for me, it seems, to do what is necessary to have good mileage !!

Enjoy!

 

I would just like to add to this interesting thread. We are currently on a road trip (LA to Minnesota) and typically been getting 19mpg (110, P300, with expedition RR, 2 adults plus gear for camping).
Here is the interesting point (only anecdotal, as I lost the app “Journey” details for the trips in question); In some quiet parts of Oklahoma and Kanas, some gas stations only sold 88 octane fuel. The defender ran perfectly on the fuel (mixed with premium remaining in tank). I could bloody swear that on that day, I got 23-24 mpg compared to the average 19.
Anyone with similar experience?

 

I had my ‘22 D 90 S (P300) for over 8 months and 16k miles. Unfortunately I retired the vehicle on Fuelly to see my last results recorded, but overall, the avg all-time mpg at the time of these photos, was relatively similar to that of when I sold the vehicle.

The Instrument Cluster’s system was also very similar to that of the hand calculations through Fuelly, within about 1 mpg or better.

About 98% of the time I was in normal drive mode with Auto Stop Start Deactivated. The other 2% of the time was Grass/Gravel/Snow, Sand (for Deep Snow), Eco, or Sport (Shifter Activated).

 

How are you calculating this MPG? Via the car's trip computer or actual manual calculation at the time of refueling? I am skeptical that a Defender loaded with passengers and gear is returning 26 mpg.