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Author Topic: Gas Mileage Thread  (Read 64208 times)

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Offline chardrc

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Re: Gas Mileage Thread
« Reply #240 on: July 08, 2011, 04:21:19 PM »
went through the first full tank of gas on road in my jeep since I've owned it. got 17.3mpg   :weee:... a nice surprise to me since I wasn't easy on the throttle given that 1/4 of the way through the tank i installed the new tb and had to test it out  :driving:. and before the new tb i was basically to the floor to keep up with traffic... but it was mainly highway miles... better than the 13 I used to get when this thread started.
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1990 YJ 4cly, ax5, 2.5 inch BDS lift, 31 MTr\'s,  Powertrax-lockers all around, track-bars removed, boomerang shackles, warn m8000 winch, electric fan. [sold but not forgotten]

2007 jk Rubicon 2dr

Offline Jeffy

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Re: Gas Mileage Thread
« Reply #241 on: July 08, 2011, 04:22:23 PM »
Quote from: chardrc on July 08, 2011, 04:21:19 PM
went through the first full tank of gas on road in my jeep since I've owned it. got 17.3mpg   :weee:... a nice surprise to me since I wasn't easy on the throttle given that 1/4 of the way through the tank i installed the new tb and had to test it out  :driving:. and before the new tb i was basically to the floor to keep up with traffic... but it was mainly highway miles... better than the 13 I used to get when this thread started.
Is that with just the new TB?
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Offline chardrc

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Re: Gas Mileage Thread
« Reply #242 on: July 08, 2011, 05:06:37 PM »
its a combo of three things.
1 the correct spark plugs (old owner had chevy v8 plugs in ti which are totally wrong).
2 electric fan
3. 50mm tb. changed after the first 35 miles on the tank (200 miles total before fill up I don't trust the gas gauge on the low end)
4. iirc that 13mpg tank was mainly city driving.

edit:
if the forecast looks sunny again this week i will see what kinda millage I can get when i know how fast im going... forgot how far off the speedo was and now know why i was getting to work so early... a decent chunk of improvement has to be from new tb, used to be pedal to metal most of the highway commute and now i can cruise at 3/4 throttle for a good portion of the commute.
« Last Edit: July 08, 2011, 05:12:57 PM by chardrc »
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1990 YJ 4cly, ax5, 2.5 inch BDS lift, 31 MTr\'s,  Powertrax-lockers all around, track-bars removed, boomerang shackles, warn m8000 winch, electric fan. [sold but not forgotten]

2007 jk Rubicon 2dr

Offline sharpxmen

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Re: Gas Mileage Thread
« Reply #243 on: July 08, 2011, 05:34:29 PM »
Quote from: chardrc on July 08, 2011, 05:06:37 PM
its a combo of three things.
1 the correct spark plugs (old owner had chevy v8 plugs in ti which are totally wrong).
2 electric fan
3. 50mm tb. changed after the first 35 miles on the tank (200 miles total before fill up I don't trust the gas gauge on the low end)
4. iirc that 13mpg tank was mainly city driving.

edit:
if the forecast looks sunny again this week i will see what kinda millage I can get when i know how fast im going... forgot how far off the speedo was and now know why i was getting to work so early... a decent chunk of improvement has to be from new tb, used to be pedal to metal most of the highway commute and now i can cruise at 3/4 throttle for a good portion of the commute.

sh!t, wish i knew before pricing it out  :lol:
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

road2damascus

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Re: Gas Mileage Thread
« Reply #244 on: July 10, 2011, 02:47:48 PM »
18.08 mpg, 30" bfg AT, no correction for larger tires, NEW autolite platinum spark plugs
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Offline chardrc

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Re: Gas Mileage Thread
« Reply #245 on: July 13, 2011, 08:47:30 PM »
filled up the jeep again today. another 17mpg tank... im happy.. but my s10 apparently wasn't... :brick:
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1990 YJ 4cly, ax5, 2.5 inch BDS lift, 31 MTr\'s,  Powertrax-lockers all around, track-bars removed, boomerang shackles, warn m8000 winch, electric fan. [sold but not forgotten]

2007 jk Rubicon 2dr

road2damascus

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Re: Gas Mileage Thread
« Reply #246 on: July 20, 2011, 06:50:11 AM »
My best yet, 18.54. Only difference from previous tanks was that I put a double dose of Lucas fuel treatment in the tank. Still not corrected for 30" tires.
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Offline chrisfranklin

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Re: Gas Mileage Thread
« Reply #247 on: July 20, 2011, 08:18:07 AM »
Was looking for a small bumper sticker saying:  

My "4" can out-"drink" your "8!"  



 :wall:
« Last Edit: July 20, 2011, 08:23:30 AM by chrisfranklin »
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'94 YJ S 5spd, Borla Exhaust, CarSound Cat., PS Ceramic-coated Headers, Airraid intake, 62mm TB, Intake Manifold bored/ceramic-coated, 19lb injectors, Sharp's Adj. FPR, MeanGreen Starter, D30 Aussie locker, 31" Destination MTs, Warn XD9000, Cibie headlights, armor

jramey

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Re: Gas Mileage Thread
« Reply #248 on: July 23, 2011, 02:07:03 PM »
Quote from: chrisfranklin on July 20, 2011, 08:18:07 AM
Was looking for a small bumper sticker saying:  

My "4" can out-"drink" your "8!"  



 :wall:

Lol im sure you could hav that made
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Torch_Ind

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Re: Gas Mileage Thread
« Reply #249 on: July 23, 2011, 06:23:39 PM »
Quote from: chrisfranklin on July 20, 2011, 08:18:07 AM
Was looking for a small bumper sticker saying:  

My "4" can out-"drink" your "8!"  



 :wall:

 :thumb:  I would get that to.. I want to turbo mine as well lol bye bye fuel lol
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Offline chrisfranklin

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Re: Gas Mileage Thread
« Reply #250 on: July 24, 2011, 07:16:21 PM »
Maybe if I don't find anything out there, I'll get a shop to design/print some. 

What kind of graphic, if any, works with something like that blurb? Or maybe you just forget the graphic and do straight white text on black or vice versa?   I know what I like for decals/bumper stickers, but my skilz figuring what other people like has always been  :gimp:  ( :lol:)
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'94 YJ S 5spd, Borla Exhaust, CarSound Cat., PS Ceramic-coated Headers, Airraid intake, 62mm TB, Intake Manifold bored/ceramic-coated, 19lb injectors, Sharp's Adj. FPR, MeanGreen Starter, D30 Aussie locker, 31" Destination MTs, Warn XD9000, Cibie headlights, armor

JeepNeek

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Re: Gas Mileage Thread
« Reply #251 on: July 28, 2011, 02:48:17 AM »
My MPG using 93 octane - 17.75

Transmision Type - Manual - NSG 370
Engine Type - Chrysler 2.4L, etc...)
Tire Size - 31"
Differential Gearing - 4.10
Speedometer Calibration (N)
List of ENGINE Mods if any Jet Chip ,TBS, Magnaflow exhaust,Airad Intake.
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Offline Jeffy

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Re: Gas Mileage Thread
« Reply #252 on: August 13, 2011, 08:32:11 PM »
So after a few months ago I swapped my wheels and tires from 15x8.5 Cast aluminum wheels and 35x12.5R15 GT MT/R's with 15x7 5-spoke OEM's and 33x10.5R15 BFG KM2's.  I've run a few tanks through so here are the results.  With my old setup I was getting an average of 15MPG.  It would dip as low as 14MPG and if I tried hard I could get 16MPG.

With the new tires and wheels I'm averaging 17.5MPG without trying.  Actually, the low was 17.3MPG.  Haven't really tried to be conservative to see how much higher I can get it but I do drive rev to 4000RPM still.  I suspect that on a road trip at 65-70MPH it will be in the 20's.  But that's just speculation right now.
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Youtube Channel: https://www.youtube.com/channel/UCZNlr60GXH5OlKIFrT7P6mg
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

Offline FourbangerYJ

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Re: Gas Mileage Thread
« Reply #253 on: August 22, 2011, 04:54:15 PM »

I knew if I slowed down I would get better mileage. While convoying with another Jeep we averaged between 60-65 (2700-2800 RPM) miles per hour. I got 17.3 MPG loaded to the gills and climbing the Grapevine from L.A. towards Fresno. I had no idea that 500 RPM would make such a huge change. Last time I did this trip a few weeks ago I was just as loaded and averaged 11.5 MPG while doing 70+ and 3200 RPM.
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Scott~

Using tools you have not used in a while is like shaking hands with old friends. :nod:

Torch_Ind

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Re: Gas Mileage Thread
« Reply #254 on: August 22, 2011, 05:08:19 PM »
Quote from: FourbangerYJ on August 22, 2011, 04:54:15 PM
I knew if I slowed down I would get better mileage. While convoying with another Jeep we averaged between 60-65 (2700-2800 RPM) miles per hour. I got 17.3 MPG loaded to the gills and climbing the Grapevine from L.A. towards Fresno. I had no idea that 500 RPM would make such a huge change. Last time I did this trip a few weeks ago I was just as loaded and averaged 11.5 MPG while doing 70+ and 3200 RPM.

takes a lot to get a little

it helped to that you all drafted each other!!
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