this has got to be the 200th thread on gas mileage LOL

 

Lol right.... I was gonna say that but didnt want them to ball me out being a girl n all, but im feeling something here... Lol

 

Well I forgot about the speedometer being off LOL, but any way I drove from ft.Smith Arkansas to hotsprings off road park wheeled a few hours and drove back home to ft.Smith on 3/4 tank put 300ish miles round trip,

 

300 miles on 3/4 tank would be about 20 mpg avg.

 

X2! Mine drinks about as fast as I do lol

I get 35 MPG, its the same as your tire size right? the bigger the better? (mileage) My CF sticker reduced wind resistance and gave me 36.1 mpg though....

In all reality, I believe maybe 2-3 people who post in these threads. Some I am sure are just straight BS, Some are what they "want to believe", others don't understand there speedometer is not accurate.... Take it for what it is. there are a TON of things that change your fuel consumption. the biggest factor, is how YOU drive...

Actual Readings (corrected speedo, police verification , 35's, 4.56's, 5.5" lifted cinder block) is 14MPG, avg. highway ONLY might see 15. but its about 14mpg no matter what when I am normally driving it, when a wild hair pops up, it drops to 10-12 lol

 

At one time i had a 97 Subaru Outback and it started overheating. One mechanic thought it was a head gasket another thought it was something else so i decided to sell it and yes i told the buyer about the overheating. It got 20-22 city and 26-28 hwy and i drove it through 10" of snow with no problem however it was not good for towing. I then got a 2002 V8 AWD Mountaineer which so i could tow my trailer. I was getting around 14 city and 20-22 hwy. I just sold it looking for a Jeep Cherokee Sport but if they are not going to do any better on mileage then the Mountaineer then i guess i will look at getting another Subaru but most likely a Forester so maybe i can tow my small trailer from time time and still do some back country that is not too rough.

 

Pictures or you are lying.

 

ok now finish running your tank till the light dings, then trow up a pic. ive had mine at 100 mi before 3/4 tank and only at 300 mi by the time i needed gas. the first half of the tank always lasts longer then the second.

 

Fwiw,

My xj is almost certainly stock....riding on 30's.... and my last two tanks yeilded an average of 16mpg.
I get MUCH better at hwy speeds....estimating close to or above 20.
City KILLS it though...I think I'm getting around13 or so.
This is with no upgrades at all and probable need of a tune up and new air filter/k&n.

Its my weekend warrior though, mostly for camping and kayak fishing so I'm fine with that. I will vdo the upgrades as soon as I get more important matters delt with...and try to squeeze a few more drops of blood out of this turnip.

 

Ok, here's my $.02 (I own a Jeep so this is all I can afford)...

My Cherokee at the time image was taken was not stock. I had the ARB Bullbar w/winch up front, Rear bumber/tire carrier and gas tank skid in the rear, all in total of about 500+ lbs of armor. Plus it was sitting on 30x9.5 tires that are 6% larger than stock which does affect your acceleration and cruising speed slightly. Also at this time it was sitting on a 2 inch budget boost lift, AEV CAI, High flow cat and Flowmaster D40 muffler.

All of that being said here's what that device is and what those numbers in the photo represent: That is a ScanGaugeII that I installed in my overhead console, it does a lot more than just calculate MPG, but for the purposes of this post, I'll simply explain the significance of what's on the screen. For those wondering, it plugs into your OBDII (diagnostic) port and reads information straight from the ECU.

On the left side it shows 22.7AVG and 22.5MPG. AVG is simply miles/gallons of fuel used for the entire trip. MPG is MPH/GPH (gallons per hour) and is what you call "instant MPG readout". This was from a 110 mile trip I took down the freeway to visit a friend in Atlanta, hence the right side showing 20TPS and 75MPH. TPS is Throttle Position Sensor as measured by % open. MPH is the adjusted MPH that the gauge displays after having it's readings adjusted +6% for tire size.

Yes this thing is VERY calibrated, and it is accurate as set to within 1/5 a gallon for a 18 gallon fuel up (basically + or - 1.1%). The best trip milleage I've ever had in this thing is 26.2MPG for a 55 mile trip during a Washington summer (no aftermarket bumpers or skids but everything else applied). I was able with great success to learn how to drive my Cherokee efficiently thanks to the variable gauge feedback on this device. Most important to me is the TPS (throttle position sensor) and ADV (timing advance - more is better/more efficient) as they let you best know how your well your foot is translating to engine power and how much more or less you could/should be using to optimize your trip. On another forum related specifically to eco-driving, the first and often best mod is "adjusting the nut behind the wheel," meaning learn how to drive efficiently in your auto before trying to find another way to mitigate mileage issues.

I'm open to any questions about fuel efficiancy and the like as I've done pretty extensive research and testing on the subject as it pertains specifically to the 2000 Cherokee.

 

This is what I'm getting, 10-12mpg, with my DD XJ w/ 3" lift and 31" tires in NYC area driving :'(



JeepNmpg2: Before I pull the trigger on this ScanGauge2, is it worth it? I'm going on vacation next weekend and will be driving from NJ to FL and back. I would love to have something like this on my drive.

 

Mine got 20ish stock no problem and I have a bit of a lead foot.

Keep your tires aired up properly and gear properly. Replace your plugs, wires, filters, ect. Seafoam the fuel system. Don't drive around with all your tools, ect. Keep your tires rotated (actually remove them every other oil change and swap the front and back). Run weather appropriate oil during different seasons.

Replace your CO2 sensor as well if you're in a cold area. The less air your Jeep has to suck in the better your MPGs will be.

XJ's get great gas mileage considering they're an SUV shaped like a damn brick. Just be smart and save where you can.

 

I dident know "xj" and "great gas mileage" could be in the same sentence!

Look at this link. Most of us(i assume) are talking about a 6cl, 4wd automatic. According to this, it says that stock got 14 city and 19 highway. And that is talking about a new jeep, not a 13 year old jeep. So im sorry, but anyone claiming over 18 mpg highway is either lieing or has done some sort of upgrade/ major tune up/cleaning.

 

calling people liars for claiming better than an epa "estimated" mileage is a little over the top. Those numbers do not by any means mean you cannot exceed those #s. I average 37mpg out of my 96 saturn and it's epa average is 33.