I have the 4.10 and track it with a app. The best ive got is 16.2. keep in mind the rating on the sticker is model wide, not model specific. So a sport with the 3.21 could see this but you will never see this with a rubi.
I also found the evic MPG to not even be close. After the last wheeling trip mine said 13.7. I filled up as soon as we were done. drove a full tank and evic then said 17.2. doing the math for that tank i got 15.5 mpg. so tell me how I could go from 13.7 to 17.2.. I have never reset the evic MPG since I bought the jeep.
We took at drive out to Rausch this past weekend, 200 mile drive. I averaged 19.20mpg and I'm in a 2door Rubicon with 4.1, 35" Duratracs and 2" lift. My everyday driving is a mix of highway/city and I only get 15mpg.
Keep in mind that the MPG numbers Jeep claims is likely based on a base model with 3.21 gears and the base 16" wheels.
However the first few months I had my JK Unlimited Sahara w/ 3.73 gears, I could regularly get 20MPG on the highway and 18 mixed. Now with mods and heavy tires I get more like 17 highway and oddly 16 city.
I have a '12 JK manual -- If I just drive to work and back (all highway; 36 miles each way) I will almost always get at least 20/21mpg... As soon as I start driving back roads and hitting lights it goes down to around 17/18mpg...
Also dont go off your cluster gauge, thats not accurate at all.
'12 JK Sport, 3.8 VVT, 6 spd man, 3.21, 255/75/17 Wranglers (soon to be 285/70/17 Dura's)
At 2000 miles 16.5, at 6200 miles 18.5 average. Mid-grade fuel. Have hit 21 on highway only driving. I do notice the better the gas, the better the mileage, have not calculated the cost benefit of premium fuel.
Not even close... Then again I have a 3" lift heavy bumper and larger tires... Even when she was stock (for about a week) I never saw over 16MPG. I have a '13 JK auto 3.73 gears.
'13 Blacked Out JK- 2.5" Rock Krawler Flex System w/ Bilstein 5100s- 15" MB TKOs w/Chaos Center Caps- 35x12.5x15 GY MTR Kevlars- Smittybilt SRC Side Armor- Poison Spyder Brawler Lite w/Brawler Bar- Ace Pro Series Rear Bumper w/Tire Carrier
pfft...you guys and your penstars...i have the crappy 3.8 and on the same trip as Matador, i got about 22 mpg and i have the 4 door...o and i have the crappy 3.21 gears and a 2" lift with 35's....maybe it was because i have the manual transmission...
On my stock 2012 JKU Sahara w/ 32" tires (not sure on the gear ratio), I average around 19 with my commute. If I don't go out for lunch, I can usually get it around 19.5-19.9. I travel 70 miles RT each workday, and over 95% of that is on the freeway.
2010 stock sport 2 dr, and i average around 20-21 mpg most days during the week. hot dogging it around in the boonies on weekends i get less, but them im driving aggressively so i wouldn't expect it to sip gas.
Ive also noticed when i take the top down, mpg at highway speeds suffers; all the extra air drag i guess. below 55 the top up or down doesn't matter.
2013 Sahara 2 dr. auto 3.73s.. I have seen tank avarages around 20.4
I do a mix of 10-20 mile highway runs and what i'd call back roads..not really much "city" driving. I do about 500 miles/ week.
i have no lift, running Grabber AT2s 275/65-18 same diameter as stock , more tread and about 2# heavier / tire.
I will same that the harder of faster i push..75-80 i see a drop. Thats just aerodynamics.