Topic: Gas Mileage Thread

[vprsrul]

89 4banger ax-5 4:10 gears with 33/12.50r15 interco all terrains with a close to correct speedo gear(reads about 58-59 at 60mph per gps)  214,000 miles with all original drivetrain never rebuilt.  i return between 14-18 mpg according to jp's trip but that would be slightly less than actual as the speedo gear is a tad slow.  she used to have 10-30 now I run straight rotella sae30 with no decrease in mpg whatsoever with only wix filters.  still no oil leaks or use from the motor.  If I keep the 4banger I will switch to amsoil.

[sharpxmen]

33x12.50's how well does that pull with stock axle ratio's?

not that great but you can live with it (i did have exactly that, 33s and 4.10 and was usable but forget 5th).

[RT]

i usually get around twenty with the 225's, when i baby it I can push it to 23-24 

[RT]

Drove an stock 89 yj 2.5 with 5inches SUA lift with 33/10.50's yesterday. WASNT SO BAD!

I have a friend with a 91, 5 inch lift, and 33's...it runs fine but he eats a clutch every sick months

[Torch_Ind]

I have a friend with a 91, 5 inch lift, and 33's...it runs fine but he eats a clutch every sick months

stop riding the cluch then.    I bough mine of my parents with the original clutch and lifted it and have drove it 2 years now with 33x12.5r15's.  I put a performance clutch in that one lasted a month so went back to my stock used one and still going with that one!!

p.s Zoom performance clutches suck balls!!!

[chrisjsmith4]

I have a 2003 2.4L nv1500/2550 what ever you wanna call it. 4:10 gears (stock). stock engine was getting 20 mix highway/city on 235, added turbo and lost a few, went down to 18-19 on 235; added 3.5 in lift and 33's getting 14 mpg. shocked at the difference. The turbo helps. I can put it in 5th on the freeway but forget about accelerating unless it is downhill. 1st through 4th gets up and moves though.

I'm thinking about doing a 6speed swap in the future. The 6 speeds come with 3:73 stock. If I do that but keep my 4:10 will it be the same result as the stock tranny and 4:56 or 4:88?

[sharpxmen]

I have a 2003 2.4L nv1500/2550 what ever you wanna call it. 4:10 gears (stock). stock engine was getting 20 mix highway/city on 235, added turbo and lost a few, went down to 18-19 on 235; added 3.5 in lift and 33's getting 14 mpg. shocked at the difference. The turbo helps. I can put it in 5th on the freeway but forget about accelerating unless it is downhill. 1st through 4th gets up and moves though.

I'm thinking about doing a 6speed swap in the future. The 6 speeds come with 3:73 stock. If I do that but keep my 4:10 will it be the same result as the stock tranny and 4:56 or 4:88?

did you account for the difference in odometer readings? it's about 15% with 33s so that will throw off your mpg calculations

[Mozman68]

My last two tanks (since the TPs, CPS and electric fan install) have both been 15.5 mpg.....I'm going to check on a regular basis from now on to verify.  Was running as low as high 13's/low 14's pretty consistently before.  Could get into 15's if it was 100% highway.

[chrisjsmith4]

If it is a 15% difference then I probably got around 16 mpg. Not really too bad but I can watch my needle drop when I go down the freeway. Its kind of a sinking feeling lol.

[Complete Loser]

17-18mpg of 87octane (city),
(mpg of oil yet to be determined),

92' ragged out 2.5L FI.
tbs, Performance Dist ignition kit, 4.0tb, Pacesetter header, 2 mufflers,
30" tires
no speedo calibration,
Ax5/np231
4:11/4:10
Startron fuel additive in every tank,
130amp alt,
new wipers.

One thing to consider on gas mileage that alot of folks forget is time sitting in the drive thru. 

[karan]

18 mpg with mostly city driving- live in downtown and work just out of it, drive 26 km every day to and fro with plenty of red lights and average moving traffic
*15 mpg with mostly city driving- live in downtown and work just out of it, drive 26 km every day to and fro with plenty of red lights and average moving traffic

As you notice i have two mpgs reported here, i do like the figure 18 mpg but its at the cost of looks of my jeep so i am going back to bigger tires this week, 30 9.50 15 was giving me 15 mpg which i think i can live with, at least it doesnt make my jeep look robbed of its natural beauty :)
 
Transmision Type Manual
gine Type AMC 2.5L MPFI
Tire Size 205/75/15
*Tire Size 30 9.50 15
Differential Gearing Stock
Speedometer Calibration (N)
List of ENGINE Mods - Cat back Exhaust System


As y

[Torch_Ind]

did over 3 hour trip and managed to get some miles/fuel used between fuel stations. this is I will say 80-90% highway.. 10-15% town or idle.. 5% drifting some corners and playing on a back road at my parents lol..

anyway here is what I came up with.


Fuel Cost
     $68
 
Distance travelled
      291     km
      180.83     miles
 
Fuel Amount
      53.17     litres
      14.05     US gallons
      11.7     Imperial gallons
Cost of Fuel
 $1.28         per litre
 $4.84         per US gallon
 $5.81         per Imperial gallon
 
Fuel Economy
18.27
        litres per 100 km
12.87
        miles per US gallon
15.46
        miles per Imperial gallon
 
Mileage Costs
23.3677        ¢ents per km
37.6        ¢ents per mile


I think I could get better because the road I took has several large grade hills!! and I was also driving in extreme winter weather conditions!!

my next fill up I'm hopping to get 50% highway "took 1/2 tank to get home from last fuel station" and 50% city/idling to see what I come up with. oh and I plowed once already.  so I'm curious what I get doing some minor highway & my typically town driving it normally does..

[stan98tj]

I hate all of you who are getting 18 and over...i REALLY hate you guys getting over 20..my jeep won't even get that parked with the motor OFF lol. Going from 31s to 33s didnt hurt me too bad in the mpg department. still 13-15. 15 on a real good day. I got 17 once (i DO NOT know how the hell that happened).
By the way has anyone seen these clips on youtube about Hydrogen boost to boost mpgs? I posted about it a while ago. Now with the increasing gas prices i've begun seeing more and more of these clips. Dateline NBC did a report on one manufacturer in particular who claimed increases and his product didnt work at all. But there seem to be many ppl who claim they do work.
here is a clip of a guy claiming 36mpgs on his wrangler:
<a href="http://www.youtube.com/v/7ireXlV7m-k" target="_blank" rel="noopener noreferrer" class="bbc_link bbc_flash_disabled new_win">http://www.youtube.com/v/7ireXlV7m-k</a>
i dont know how to embed it

[Jeffy]

I hate all of you who are getting 18 and over...i REALLY hate you guys getting over 20..my jeep won't even get that parked with the motor OFF lol. Going from 31s to 33s didnt hurt me too bad in the mpg department. still 13-15. 15 on a real good day. I got 17 once (i DO NOT know how the hell that happened).
By the way has anyone seen these clips on youtube about Hydrogen boost to boost mpgs? I posted about it a while ago. Now with the increasing gas prices i've begun seeing more and more of these clips. Dateline NBC did a report on one manufacturer in particular who claimed increases and his product didnt work at all. But there seem to be many ppl who claim they do work.
here is a clip of a guy claiming 36mpgs on his wrangler:
<a href="http://www.youtube.com/v/7ireXlV7m-k" target="_blank" rel="noopener noreferrer" class="bbc_link bbc_flash_disabled new_win">http://www.youtube.com/v/7ireXlV7m-k</a>
i dont know how to embed it

It's the flames.  They add 20HP and raise the MPG 10-15 MPG.  I think he's got JATO rockets as nerfs as well.

[Torch_Ind]

I hate all of you who are getting 18 and over...i REALLY hate you guys getting over 20..my jeep won't even get that parked with the motor OFF lol.

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?