Those of you with pentastars and want better mpg... Try going light on the throttle for a day. You'll know you're doing it correctly when every_single_vehicle around you leaves you behind from a red light. You can then catch up once you're around cruising speed. Also, when speeding up while already at cruising speed, try to do it lightly enough to where the ECO light never turns off. It's a nice little challenge.
I think these must be big reasons I'm over 20mpg in a JKU and my wide over 21mpg in a JK
I've got about 2300 miles on my stock 2013 JKUR with 4.1 gearing. I've been doing the math myself, and I'm getting between 14.5 and 15.5. I drive a mix of city/highway, and I've been pretty easy on the throttle. Oh we'll, it's better than my previous Expedition.
I see 14.6 mpg (13' JKU Sport S 3.73 5sp) auto on my computer... however it's 80% city driving including 45 minutes idling at the border crossing last week. I'm sure if I put it on the highway I'll get close to the 19-21 that most get.
2 Door Rubicon 4.1 gears, Auto, Weighs in at 5000 pounds (certified scale weight), Roughly 900 pounds over curb weight, stock suspension, tires, and wheels. Second tank of fuel calculated 19.8 mpg, drove from Charlotte to DC and back now 1500 miles on the Jeep averaged 18 mpg calculated and had a strong head wind. For the DC trip I only bought Shell 87 octane and stop when the pump kicked off.
For the second tank I burned this in the same day bought real gas, no ethanol, at local station in Clover on both ends of the trip to Greenville, SC. This is a station that is full service so I had the same attendant pump the second tank and stop when the pump kicked off.
Planning on driving Jeep from Clover to Dayton Ohio on Monday and return on Wednesday this coming week will try it again
I drove my '12 JKR 4.10 cross country last year and stopped in umpteen national parks and even did some trails in Moab. I averaged 18+ mpg overall, and consistently was at 21.x on the highway. For a time in yellowstone, I was at 27. FWIW, I definitely think the ethanol gas kills your mileage.
Made 250 mile run on the freeway yesterday.....filled up before & after....measured 22.2 mpg for that distance.
Typically overall average is just between 19.5-20 for all around use.
But I _CAN_ make it go to the low 16s.....
get in--buckle up--hang on
"soothing agricultural implement/personal servant/Walter Mitty multidimensional access utility device conveniently travels on pavement when necessary and often keeps me warm/cool/dry/soothed as needed."
I have a 2013 2 door Rubi and just took a 3600 mile trip from texas to idaho and back. Granted the trip was far from always on level ground but I did track my milage at every fill up and I rarely achieved 21 mpg. I drove all posted speed limits. I found that as you would expect the best mileage was around 60 to 65 mph. I even got around 21.7 mpg on level ground just north of Roswell NM. As soon as i sped up to lets say 70 mph the milage dropped to 17 mpg. Also the milage really dropped off at higher elevations (+5000 ft).
12 jk with 3.21's stock 18" with 32's dd about 34 miles round trip all back roads in rural Jersey. I average between 21 and 22, I baby it for the gas mileage. Will end soon , I'm going to upgrade to 33's, not sure what size rim yet.
4:10's with 35's. 1600 miles on mine. Running regular gas. Took a ride down the hwy not a real long run, about 20 min ride. My avg was 20.1. Not to shabby. I'm thinking we are on summer blend now. I was only getting like 18 on the winter blend.
i have a 2 hour trip today, mostly highway ... will post back. here the speed limit is 70 so i'll be going 70
ok ok, i averaged between 18.5-19 mpg over 250 mile trip. most was highway and the speed limit here is 70 so i was doing 70-75. the jeep seems really happy at 60-65 though and i probably could have squeezed 20mpg. this is with jkur 4.10s manual.
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JKU 2012 Sahara stock tires, 3.73's and auto just below 65 average hiway 21.5 0n dash indicater whis is about 2/10th higher than doing the math. Same 30 mile commute back road very few traffic lites it'll break 23 at 45/50 mph. Oh ya that was before Chrysler put new head on, don't think as good now??? My old 2007 JKU with 4.10's and auto did just as good on hiway, not as good on that back road commute. That had a dual exhaust flowmaster setup...Pentastar is supposed to be better, that's questionable? At least the "old" 3.8 didn't have head replacement trouble...like the new Tranny though!
Oh ya, trip to Nova Scotia about 1800 mi last summer averaged almost 21 overall...old head???
2013 rubi unlimited with 285/70/17 and no lift. We took a small sight seeing trip to northern Nebraska this weekend. On a one lane rural hwy I got around 21mpg while at 55mph. When I was over 60 it went down to 18. Oh, 4:10 gears.
I have 3.21 gears, stock 29" wheels. I live 3 miles from work with about 14 lights in between. My average is 11 to 13 mpg, I'd like to know if I chang to 33" tires and keep my gears, will it make any difference? Could it possibly get worse?
Anyone have mods like a free flowing exhaust/computer chip/cold air intake and get different mpg readings? I know some of these mods do claim power and mileage gains.
I lifted my 2013 JKU 2 inches, put on 33's x 12.5 with 17 wheels. I have been on a few trips off road and on the highway and wrote down my mpg. I then put on a AEM Cold Intake System, did the same run, and didn't see any difference. I sent it back, and just put in a AEM Air Cleaner filter and saved my money. I would like to hear if others have had the same results. I have heard that earlier models of cars, trucks, jeeps get good results from a cold intake system but newer models don't.
In the 4 months I've had my 2013 2 door sport, I've never gone below 18 mpg for a tank. While I haven't gotten 300 mpg, I regularly hit over 300 miles before getting the fuel low warning on my DTE.
6 speed, 3.21 with stock tires.