Topic: Gas Mileage Thread

[stan98tj]

really I get 15 with mods and 6inches of lift 4.88's and 33's with open front fenders and a bit top light bar.. I could prob squeeze 17ish if I was easy on it in nice weather and flat strait roads.

also I did a mpg check when I was stock with 31's pulling a small trailer with a min z on it. and all our gear in the jeep we got roughly 22mpg

what do you got for a build ??
also do you run a/c
let it idle a lot?
clutch fan stuck?

stock fan. no a/c. auto, 33s, stock gears. Im just saying, it's like driving a barn...20+mpg is a lot more rare with these wranglers, i would think.

[Torch_Ind]

stock fan. no a/c. auto, 33s, stock gears. I'm just saying, it's like driving a barn...20+mpg is a lot more rare with these wranglers, i would think.

ditch the stock fan go electric also get bigger gears won't have to work as hard on take off. also auto robs more power then stick "I'm stick"  being your lifted on 33's I would say you may never see 20mpg's again.

drop to 31's with stock gears and you would get just over the 20mpg range.

I got the 15 but the weather was extremely bad and the road I had to take it was full of step grade hills and did a little town driving so I was impressed I got 15mpg's 

this summer when the weather is nice I want to do a south trip from were I am to see if I can hit the 20mpg or close to 20mpg because it's all flat strait road going south and they have blasted through most of the step grade hills.

[Jeffy]

stock fan. no a/c. auto, 33s, stock gears. Im just saying, it's like driving a barn...20+mpg is a lot more rare with these wranglers, i would think.

How fast are you driving?

[stan98tj]

How fast are you driving?

55-60mph. i think 15mpg is normal though...id love to hit 18+ but im not too sure how those ppl are getting that (esp those with larger lifts and tires than i). but then again, the dude in that clip i posted is getting 36mpg!!!!!! lol

[Jeffy]

55-60mph. i think 15mpg is normal though...id love to hit 18+ but im not too sure how those ppl are getting that (esp those with larger lifts and tires than i). but then again, the dude in that clip i posted is getting 36mpg!!!!!! lol

Did you recalibrate your speedometer?  That would make a difference.  15MPG is what I get but then I push my Jeep a little and get it up to 70mph on bursts.  I also do a lot of short (6 mile) trips during the week.

I get as low as 14mpg but I average 15mpg.  That's calculated over several years.  When I was driving on the highway more (40 miles), I'd get 18mpg though.

Honestly though, if you want to get better gas mileage you will need to reaccess your priorities.  Things like, if you're driving offroad enough to need 33x12.5R15's.  Skinny 33's or 31's would probably help a lot.  Wider flares, crawler fenders, and a lot of other stuff that help offroad will really hinder your mileage as well.

[Torch_Ind]

Did you recalibrate your speedometer?  That would make a difference.  15MPG is what I get but then I push my Jeep a little and get it up to 70mph on bursts.  I also do a lot of short (6 mile) trips during the week.

I get as low as 14mpg but I average 15mpg.  That's calculated over several years.  When I was driving on the highway more (40 miles), I'd get 18mpg though.

Honestly though, if you want to get better gas mileage you will need to reaccess your priorities.  Things like, if you're driving offroad enough to need 33x12.5R15's.  Skinny 33's or 31's would probably help a lot.  Wider flares, crawler fenders, and a lot of other stuff that help offroad will really hinder your mileage as well.

ya I'm open tube fenders now to

[stan98tj]

  When I was driving on the highway more (40 miles), I'd get 18mpg though.

i just drove down to baltimore ~300 miles and got ~15mpg. Even when i had the 31s it was 15, maybe 16mpg.  What size tires were you running when you were getting 18mpg? I've been thinking of doing an e-fan mod, but im not sure if it helps all that much. Also maybe ditching the AEM cold air intake for a snorkel..again im not sure if it will help much

[Jeffy]

i just drove down to baltimore ~300 miles and got ~15mpg. Even when i had the 31s it was 15, maybe 16mpg.  What size tires were you running when you were getting 18mpg? I've been thinking of doing an e-fan mod, but im not sure if it helps all that much. Also maybe ditching the AEM cold air intake for a snorkel..again im not sure if it will help much

I've got 35x12.5R15's and 4.56:1 gears.  But I was getting 18MPG before I ever did the eFan.

Are you running 33's with 3.73:1 gears?  What's your crusing RPM and speed?

[stan98tj]

I've got 35x12.5R15's and 4.56:1 gears.  But I was getting 18MPG before I ever did the eFan.

Are you running 33's with 3.73:1 gears?  What's your crusing RPM and speed?

yes with 3.73s. 65mph is under 3k. around 2750-2800

[sharpxmen]

yes with 3.73s. 65mph is under 3k. around 2750-2800

it that with the converter locked? how far down you have the pedal?

[RT]

With exhaust, throttle, intake, cleaned fuel injectors and a lift with 30" tires I'm doing pretty good. I'm at just over a quarter tank left with 200miles on the odometer....we'll see how that turns out

[stan98tj]

it that with the converter locked? how far down you have the pedal?

half throttle. i will be driving home on friday. my speedo isnt recalibrated, but i have a gps unit. ill pay closer attention to my rpms at 60-65. but i know for a sure that cruising at 65mph with my current equipment (33s, 3.73gears,3spd auto, 62mm tb, CAI, header/exhaust/hi-flo cat) i am under 3k (maybe 2750-2800) and i am around 15mpg. i will pay closer attention when i head home on friday.

[Jeffy]

half throttle. i will be driving home on friday. my speedo isnt recalibrated, but i have a gps unit. ill pay closer attention to my rpms at 60-65. but i know for a sure that cruising at 65mph with my current equipment (33s, 3.73gears,3spd auto, 62mm tb, CAI, header/exhaust/hi-flo cat) i am under 3k (maybe 2750-2800) and i am around 15mpg. i will pay closer attention when i head home on friday.

Seeing as the PCM uses the VSS (aka: speedometer) to adjust timing as well as the air/fuel, you are probably losing some points there.

[sharpxmen]

half throttle. i will be driving home on friday. my speedo isnt recalibrated, but i have a gps unit. ill pay closer attention to my rpms at 60-65. but i know for a sure that cruising at 65mph with my current equipment (33s, 3.73gears,3spd auto, 62mm tb, CAI, header/exhaust/hi-flo cat) i am under 3k (maybe 2750-2800) and i am around 15mpg. i will pay closer attention when i head home on friday.

how do you calculate mpg?

[stan98tj]

how do you calculate mpg?

it was a rough calc. from fill up to nearly empty. i know it's not the most accurate way to calculate it, but it gives me a rough estimate. sometimes ill calc it to half tank as a rough look.