of course mpg is a valid discussion. My diesel version is still way under Jeeps official figures. They quote 43.5mpg extra urban
and 39.8 combined. Although improved after last service still at the bottom of the figures. Only done 6700miles maybe loosens up with age. would love to know how they got these figures. Or whether they are actually achievable
Isn't that based on imperial gallons? Either way that's a dream for the states. I avg 40+ mpg in my TDI with a high of 52.7 all hwy and in us gallons. That was 25k miles ago and they say my engine isn't broken in yet. I've driven all city romps of about 2 miles to work and got a lowest mpg of 34. Amazing what diesels can do. To bad they load them down with dpf's and other mileage reducers.
Jeep #3.. 2012 JKU Sahara, Deep Cherry Crystal Red with body color top and fenders, automatic, 3.21's with limited slip.
2010 Mustang Gt 5spd, 3.73's, SLP loudmouth axle back,Roush CAI, factory 19's,leather and glass roof.
Before I removed my airdam I hit 21.7 on a 9 hour trip from cleveland to NC. Since removing it the best I've done is 19mpg but that was only a 7 hour drive up to northern Michigan. But usually I'm averaging like 15mpg...
I don't even look at the EVIC, I take the trip odometer mileage at fill up and top off the tank. Mileage divided by fuel consumed = MPG. Try resetting the EVIC on the highway mine showed 41 mpg , never going to happen, it very dynamic
If you're going to calculate it with the trip mileage, then the trip mileage needs to be exact, and it usually isn't. You may notice that if you look something up on google maps, and then drive it exactly as it shows, The mileage on you trip may be different than the actual road distance due to slight variations in tire diameter over what the vehicle computer is programed to. I think they only work in increments of .25 in anyway (don't quote me on that). I suppose if you wanted the most accurate reading, you'd have to top off your jeep, drive a known gps mileage, top your jeep back off to see exactly how much fuel you spent and then divide the mileage by it!
But even then I wouldn't bother cuz there's a million other things that factor in. Just make sure your computer is set up well.
I have drove over 1875 miles in the past few days. Road trip from Montreal (Qc) to Orlando (FL) and the area. 99% was highway. The best that my Jeep's computer has showed me was around 11.2 L/100 km (21.38 mpg). But hand calculated, my average for all those miles is 12,95 L/100 km (18,27 mpg). Average speed was around 70 to 80 mph when I could. My JKU is a stock Sahara with 6 speed manual and 3.73.
So far after two weeks of ownership, I am getting between 21.6 and 22.4 MPG based on the digital display (and I know how accurate they can be). I am thoroughly pleased with the MPG on this so far, my last car (2005 pontiac grand prix GTP Comp G) was getting about 18-19 on the highway and it took only premium .
My last fill-up showed 20.8 mpg after doing the math. It was a tank of regular mixed 50/50 with Premium/NO Ethanol. The drive was mixed with some I-5 including Siskiyou Summit and then paved mountain roads in Siskiyou county CA plus around 20 miles of steep 4WD high. My Sport S with 3.73 only has about 1750k miles and otherwise the best I had seen was low 18's.
Not sure I will continue with the experiment because the Ethanol free premium cost .80/gallon more than Premium with Ethanol. Might wait several tanks and try it again.
coming soon: 2013 Billet Sport S
I get as high as 23.8 to 24 with a 3.73 2 dr 6sp but that's keeping it at 50 to 54 mph.
The minute I go up to 60, the MPG goes down to 21.5 ish.
FWIW, I also have the rear seat removed and my jk is a plain jane sport with no options except the 3.73 which makes for the lightest wrangler made.
Stock setup, 7 1/2 hour driving in the flatland's and mountains, computer showed 21.2 actual calculation when I gassed up was 20.1. I'm happy considering the mountains and running the A/C most of the day with the bikini top on in 100 degree heat.
I've recently started using non oxygenated Premium gasoline in my 13/JK Wrangler.
i.e. NO ETHANOL.
Huge difference in mileage and run conditions of the 3.6.
I saw 24.1 today! Normally at least 22 with this gas type.
It costs more but so many benefits, I don't mind the hit.
It CLEARLY performs better!
I also use Mobil 1.