^^ this. That goes for new car commercials as well. Saying it goes 500 miles on a tank doesn't mean squat. The tank could hold 40 g's for all they tell you.

 

when i purchased my jeep i was getting about 200 miles to a tank the first 3 weeks i owned it. Once i did the tuneup changing everything, air filter, oil change, complete new exhaust (walker hi-flow cat, flowmaster50) i have been getting about 330 miles to a tank ever since for about 3 months now. i do a mix of highway and local driving.

my jeep is a 98 and has a 20g tank. what size tank do you have???

 

He's saying you thing can reread off. Like mine..when I fill up it says I've put in like a gallon to much..lol and when my gas light comes on, I still 5 or so gallons..but I thinks I only have 2/3 left. Idk mines VERY screwy..I normally try and just keep track of the miles I've driven and fill up around 200 (used to be 1/2 tank..10g) but now its acting different and I'm getting worse now...or seem to be. But who knows..

 

when i fill up when the light comes on i usually have 330 miles on the trip and i usually pump about 18 gallons.

your needle might be floating? when you run yours down to the light coming on, try to pull off immediately and get gas. take note of how many gallons you pump....

 

i have a 20 gallon tank, this is what my jeep came with

Sales Code Description
*Q7 Cloth Low-Back Bucket Seats
ADH Heavy Duty Electrical Group
AHT Trailer Tow Group
ALR ST Value Group
APAS Monotone Paint
ARCA Rubicon Group
ARN Laredo Decor Group
AWHA Power Equipment Group
BGAS Power Front Disc/Rear Drum Brakes
CACP Low Back Bucket Seats
CDBP Reclining Front Seats
CFMS Rear Folding Seat
CKBP Floor Carpet
CKNP Cargo Compartment Carpet
CKTP Cargo Tie Down Loops
CKVP MOPAR Third Row Cargo Bins w/Table
CLEP Front & Rear Floor Mats
CSAP Spare Tire Cover
CSCP Cargo Compartment Cover
CSRS Passenger Assist Handles
CUFP Full Length Floor Console
CUNA Overhead Console
DGB All 4-Speed Automatic Transmissions
DGSS 4-Speed Automatic AW4 Transmission
DHP Selec-Trac Full Time 4WD System
DHSS Floor Mount Automatic Shift Lever
DJHS 230MM Front Axle
DMDS 3.55 Rear Axle Ratio
DRMP Dana 35C/194MM Rear Axle
DSA Anti-Spin Differential Rear Axle
GBBS Tinted Windshield Glass
GCBS Front Door Tinted Glass
GECP Front Left Side Sliding Window
GEDS Tinted Rr Drs/Qtr/Liftgate Glass
GFAP Rear Window Defroster
GNAS Rear View Day/Night Mirror
GNCP Sun Visors w/Illum Vanity Mirrors
GRBP Left Mirror
GSBP Right Convex Mirror
GTBP Power Heated Mirrors
GXMP Remote Keyless Entry
HAAA Air Conditioning
HGDP Deluxe Insulation Group
JAYP Instrument Cluster w/Tach
JCAS 85 MPH Primary Speedometer
JGBP Digital Clock
JHAP Var Intermittent Windshield Wipers
JHBP Rear Window Wiper/Washer
JJAS Cigar Lighter
JPAP Power Windows
JPBP Power Locks
JPT Power Front Driver/Passenger Seats
LAJP Headlamps On Warning Chimes
LBBP Courtesy Lamps
LBCS Glove Box Lamp
LBDP Ash Tray Lamp
LBEP Cigar Lighter
LDBP Cargo Compartment Lamp
LDHP U/Hood, Removable/Rechargeable Lamp
LHDP Headlamp Off Time Delay
LMAS Halogen Headlamps
LNJA Fog Lamps
MB3P Body Color/Bright Front Fascia
MB7P Bright Rear Bumper w/Accent Color
MCAP Front Bumper Guards
MCBP Rear Bumper Guards
MDAP Front License Plate Bracket
MFMP Black/Bright Grille
MHBS Bright Windshield Moldings
MMCS Rear Qtr Solid Window Insert
MMGS Belt Moldings
MTAS Rear Fascia Skid Plate Applique
MWAP Roof Rack
NAAS Federal Emissions
NBKS EVAP Control System
NFAS 20 Gallon Fuel Tank
NHBP Auxiliary Transmission Oil Cooler
NHMA Speed Control
NMCP Heavy Duty Engine Cooling
RAAC All Radio Equipped Vehicles
RAFA AM/FM Cassette Radio
RCGP 6 Speakers
RDCP Power Antenna
SBAS Power Rack and Pinion Steering
SCGP Leather Wrapped Steering Wheel
SFAS Standard Duty Shock Absorbers
SGAS Rear Shock Absorbers
SUAA Tilt Steering Column
TAAC All Tires
TBB Full Size Spare Tire
TBLS Inside Mounted Spare Tire
TMWA P215/75R15 OWL All Terrain Tires
WJN 15" Aluminum Wheels
WLZC All Aluminum Wheels
YAAS Build To U.S. Mkt. Specifications

 

Nah this is my 4th airtech fuel pump. And when I did this one (that's in right now) I just said f*k it and threw it in and I think its crooked in the tank and bumpen the side of the tank.... And I think that this ones messed up too. I think my back flow valve is effed up. >

 

I get usually about 240-250 a tank. I dont get on it 3" lift and 265/75r16 tires.

 

5" lift and 285/75R16 radials I avg 18mpg, with my 33x12.50R15 bias swampers I am lucky to get 14mpg. Driving normal I would say not jumping on it and keeping it under 3k. Still running the stock 3.55s in a 30/35 combo. Hoping to keep similar mpg with 35s and 4.88s. Just fyi my mpgs is corrected vs the speedo being off. That being said uncorrected I still get 250-300 miles before I fill up.

 

Okay stupid question but if you spedometer is off how does that effect your gas millage? Mine is off by like 4 mph im pretty sure. And im getting around 13mpg.

 

Stock gears? It will read slower if you have bigger tires so you should be getting closer to15-16 in reality

 

The only way to know is to use GPS and do the math the rest is just a guess.

 

I'm sorry, but I've gotta say pish posh to that!! One of my favorite things to do in my Cherokee is to be first at that red light, and when it goes green, there's just nothing like putting the pedal to the metal... even if you only do it until you hit the speed limit, hahaha I just love hearing and feeling the power and torque, especially when a little ricer tries to be fast but only gets left in the dust (and mud chunks!!)

But in all seriousness, doing so really destroys your fuel economy. I do it every so often, I'm a bit over-average - lead foot for sure. I get about 230 mi to the tank though - 16 gal a week.

 

Yes stock gears. Makes sence. thanks!