How many miles per gallon in your JK?
06-15-2011, 09:50 PM
#31
JK Junkie
Join Date: Nov 2010
Location: Whitefish,Montana
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I'm rockin 12mpg highway and 8 around town. I'm on tf 2.5bb and 35x12.5 bfg km2. No bumpers or winch yet. Soon going to aev 3.5 premium with procal and correct gears and 37's
06-16-2011, 02:40 AM
#35
JK Enthusiast
Join Date: Apr 2011
Location: Westminster, MD
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I don't use the onboard either because it's off. Mine is calculated by the odometer each fill up and I use fuelly.com as well... My avg is 20.4 overall with a best of 22.3.
06-16-2011, 03:38 AM
#36
JK Newbie
Join Date: May 2010
Location: PA
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07 sahara 6sp. year round run 18-22 mpg.
will be on the interstate for a ways tomarrow, always run about 70 mph and avg 22-24
Lift kit goes on this weekend, tires coming soon so there goes my high mpg. Oh well
will be on the interstate for a ways tomarrow, always run about 70 mph and avg 22-24
Lift kit goes on this weekend, tires coming soon so there goes my high mpg. Oh well
06-16-2011, 04:19 AM
#38
JK Super Freak
Yewoch, 8mpg hurts. We have same set-up (mine in signature below) and rig gets 10-11 around town and 12-13 on highway journeys. I'm on 4.10 gears with winch, bumpers and other weighty gear.
06-16-2011, 04:48 AM
#39
JK Freak
Join Date: Dec 2009
Location: Grass Lake MI
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If you can't tell by what I have below, I am an engineer and am kind of anal about these things...
2011 Stock Rubicon JKU:
4 fill-ups, mean calculated = 17.52MPG, Standard deviation of 0.4MPG
2011 Rubicon JKU, Rancho 4" short arm lift, coast front driveshaft, 35x12.5 KM2's, Banks intake, Dynomax exhaust, AEV Procal to fix tire diameter in calibration:
All driving conditions including wheeling and tops/doors off
12 fill-ups, mean calculated = 15.38MPG, Standard deviation of 1.16MPG
Removed wheeling trips from the previous calculation
11 fill-ups, mean calculated = 15.60MPG, Standard deviation of 0.92MPG
Removed wheeling trips and tops/doors off from previous calculations
9 fill-ups, mean calculated = 16.02MPG, Standard deviation of 0.64MPG
So, some conclusions...
Ovarall if you include all kinds of driving situations, I lost a little over 2MPG with lift. But, I don't think that is fair because when you wheel you know your MPG is going to suck but you don't care because that is not what you are there for. Therefore, if you remove wheeling trips, I only lost a hair under 2MPG. And last but not least, I have found that topless/doorless causes increased aerodynamic drag (however I would like more data points to prove this), so if you compare apples to apples (pre lift with top always on and no wheeling to post lift with top on and and no wheeling), you can see that I only lost about 1.5 MPG.
Also, you can see from the standard deviation numbers that the off road and topless/doorless pushes the calculated MPG's farther away from that mean line for the individual data points (scatter), which reinforces my my last apples to apples comparison (the standard deviations are pretty close). Also, it should tell you that if you want consistent fuel economy, keep the top and doors on and don't wheel. But who wants to do that right?
2011 Stock Rubicon JKU:
4 fill-ups, mean calculated = 17.52MPG, Standard deviation of 0.4MPG
2011 Rubicon JKU, Rancho 4" short arm lift, coast front driveshaft, 35x12.5 KM2's, Banks intake, Dynomax exhaust, AEV Procal to fix tire diameter in calibration:
All driving conditions including wheeling and tops/doors off
12 fill-ups, mean calculated = 15.38MPG, Standard deviation of 1.16MPG
Removed wheeling trips from the previous calculation
11 fill-ups, mean calculated = 15.60MPG, Standard deviation of 0.92MPG
Removed wheeling trips and tops/doors off from previous calculations
9 fill-ups, mean calculated = 16.02MPG, Standard deviation of 0.64MPG
So, some conclusions...
Ovarall if you include all kinds of driving situations, I lost a little over 2MPG with lift. But, I don't think that is fair because when you wheel you know your MPG is going to suck but you don't care because that is not what you are there for. Therefore, if you remove wheeling trips, I only lost a hair under 2MPG. And last but not least, I have found that topless/doorless causes increased aerodynamic drag (however I would like more data points to prove this), so if you compare apples to apples (pre lift with top always on and no wheeling to post lift with top on and and no wheeling), you can see that I only lost about 1.5 MPG.
Also, you can see from the standard deviation numbers that the off road and topless/doorless pushes the calculated MPG's farther away from that mean line for the individual data points (scatter), which reinforces my my last apples to apples comparison (the standard deviations are pretty close). Also, it should tell you that if you want consistent fuel economy, keep the top and doors on and don't wheel. But who wants to do that right?
06-16-2011, 04:58 AM
#40
JK Enthusiast
Join Date: Apr 2011
Location: Conway, AR
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Current stats with mostly around town driving. One off-road trip. One long distance road trip. One 50 mile trip towing 1500lbs.
Average MPG 15.82 (my calculation not the on board computer)
Average Price per Gallon $3.704
Average Price per Mile $0.235
Average Miles per Fill Up 205.18
Total Mileage 3,018
Stock 2 door Rubicon with hard top, manual transmission, 4xFix front bumper and Ramsey 9500UT.
Average MPG 15.82 (my calculation not the on board computer)
Average Price per Gallon $3.704
Average Price per Mile $0.235
Average Miles per Fill Up 205.18
Total Mileage 3,018
Stock 2 door Rubicon with hard top, manual transmission, 4xFix front bumper and Ramsey 9500UT.
Last edited by cyberfalco; 06-16-2011 at 05:03 AM.