I think that the tank is 20.5 gallon. I usually figure my mileage by miles/gallons to fill up, but the truck stop I go to had the bright idea to put a $75 limit per fillup on the pump . I put in 19.3 gallons which I know she was close to being full but makes the calculation inaccurate. I'll just have to go back when I know she'll get full before $75.

_________________
1973 Buick Centurion Convertable 455/4bb
1988 IROC-Z T-Top 350/TPI/it died
1997 Dodge Dakota 3.9/ dead also
2002 Suzuki Bandit 1200
2007 Jeep GC Diesel Limited

I have an 05 and typically get 25-26 mpg by keeping it under 2000 rpm (68 mph) on my 80 mile round trip commute. My EVIC always indicates 2-4 mpg higher. When I can get fuel with centane >45, then I get in the 30+mpg on highway trips. Its all in the fuel quality !!!

_________________
05 CRD Sport, Inferno Red (240K miles, Jan 2016)
Westin Brush Guard, Hella 500, Hidden Hitch
Magflow Muffler, ProVent CCV, Fumoto Valve, ORM
OEM Skids and Rails, EVIC, Mr Diesel Fuel Pump
Michelin XTerrains 235/70/16

I had that happen as well. I bought fuel twice so I could get an accurate "gallons to fill up" amount. It only took about another gallon and a half, but it would be nice if they rasied the $75.00 limit.

_________________
2005 Limited CRD

Chad - Its a 20.5 gallon fuel tank.

_________________
2006 Jeep Liberty Sport CRD

Off the topic for a bit but that 75.00 limit is what I know about.
Towing the Libby behind me and Motorhome gets 7.5 mpg.
75 bucks ain't much to fill at 3.+ a gallon. Have to stop twice as much
as normal to get the same fuel.
Now back to the topic.
Steve

_________________
06 Silver Liberty
EHM/SEGR
Fumoto Oil Drain
No rock climbing
No mudding
Hangs behind my
motorhome on tow bars. Semi-retired and still learning.

That would be me too but never got much beyond 32. That was a Spokane to Seattle to Portland trip with no tail wind and mixed highway and interstate.

_________________
Dave

'06 CRD Limited, Lt. Khaki, MOPAR Slush Mats/Skids, DrawTite Front Hitch, Mag Lite, Yakima Bars, Thule Bike Rack, Fumoto, ORM, 245/70 Revo 2

Wish list: Lift, Boulder Bars, Something Bigger in the Front and Back, More Lights

I think i have hit 32 on the evic but usually I can see 30+ on highway at 68-72mph(hate cruise control). I have to GPS her next trip which is saturday and take measurements manually.

I am also running Power Service(grey) and now experimenting with 50/50 PS and TCW3. A lot of my driving is literally 2-3 mile trips, stop and go, so I can actually get 18-20 per tank if I never hit the highway.

_________________
2005 CRD Black Limited SP'd
2001 MB E320 Black
1987 MB 560SL Red MINT
1980 Corvette Purple 400hp
2001 HD soft tail Deuce Black
1985 Honda ATC 250SX Red

My 05 started at 19-21 before playing with all the mods. Now I'm at 23-26 depending upon throttle weight - which is tough for me since I love the way this tractor yanks me around with the low speed torque in traffic. Since we now own 3 diesels I have learned to play with the shifting - I punch it just as it shifts from gear to the next and then slightly back off so it shifts again. By riding the torque curve its great in traffic. Most of my driving is in fairly heavy traffic as is my wife's. Mine is punctuated by driving up into the mountains and beating the crrap out of it every other week.

My wife's 06 consistently gets 19 mpg. Over the past month it was getting a terrible 16-19...which is getting perilously close to my F350 4X4 dually on a good day. However, after cleaning the MAP the other day, it appears to be up to 21 again. But it is distinctly worse than my 05 with the mods. I intend to keep modding mine an checking for improvements and then perform all the mods on my wife's car that were the biggest hitters. Unfortunately, I am beginning to realize none are huge but just a series of small improvements that eventually add up.

My 05 has been F37 neutered and my wife's has not been.

_________________
2005 CRD Limited:
* 245/70/16 Nokian Vatiiva
* Magnaflow
* Kennedy Diesel lift pump
* Custom CCV condensor
* Custom modified thermostat housing w/bleeder valve

2006 CRD Limited (wife's)
* Bone stock

Highway 29.62
City 19.68
Overall 24.54

2005 March build. Was supposedly neutered but I can't tell the difference. My odometer is 2% low. At 55k miles I think it is finally broken in. Mileage is the same now on ULSD as it was on LSD, so it has improved enough to cancel the supposed loss due to ULSD. Oil has cleaned up to where it is just black oil now, not walnut stain.

I get 16-17city and 20-21.5 hwy after a few hours of driving.
hit an alltime high of 22 a week ago on my way home from florida.YeeHaw
so i hope none of you were wining"you could've bought mine"

_________________
Bub
06 Inop Edition CRD Silver
06 Inop Edition CRD Green

Cleaned your MAP sensor lately?

_________________
2006 Jeep Liberty Sport CRD

I highly recommend the MAP clean.
Mileage is up and the power is fun,
23.4 mpg uncorrected, in that I have not verified stock configuration for accuracy.
I was getting 18-22 and concerned before MAP clean.
R

_________________
'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms

I cleaned MY MAP Sensor This week and before I started, I disconnected the Neg. of the Battery. I then cleaned the MAP sensor with
Carb. Cleaner and put every thing back. I also got some M6 nuts to replace those funky clips holding the wiring harness down. cost .30 cents.
I am now getting 23 MPG in town driving. Best I have ever got.
Jim

If I could raise a point against cross referencing your miles traveled against a GPS unit. Unless the GPS units are on the extremely expensive side (ie a professional surveyors setup) I think the error of our personal/car units is way more than the ~1%( our ODO are off. I have a hand held unit and you can see the satellites you're tracking as you use it, it also give a +/- in ft of your position (usually +/- 20ft depending on availability of satellites, although I have seen as good as +/- 3 ft). Now assuming the car units use these same satellites and plotting method as on my hand held which plots a "track" as you walk, hike, etc. you get that +/- error at every point along your track. To achieve the accuracy that the surveying units do, they must be over a set point for much longer than a hiker or vehicle is over it's point at which the data is recorded. I believe that using the ODO will give better and more "accurate" results as it knows your tire size and probably calculates distance based on trans revs or something more mathematical. I use the ODO readings usually and haven't cross references for the above reasons and have found the calculated MPG's to be well within the realm of the possibilty. However the calculated MPG's are way off from what the EVIC says.

_________________
'06 CRD
Frankenlift II, 245/75/16 Goodyear MT/R's on Moabs, Samco Hoses, Provent, Mopar iPod Integration Kit

Yes, it does use tire size and revs.

But tires are not all the same size and tires change size as they wear.

_________________
http://www.Colorado4Wheel.com
"Its not about what you can DO with your Jeep, its about where you can GO with your Jeep."
Knowledgeable - But Caustic

Tire size does change, however after crunching some numbers I have reached this conclusion: it is still more accurate to use the ODO verses a consumer GPS unit.

Error associated with changing tire size using the tires I have on my Liberty (Firestone Destination LE's) at OE size.

Original Diameter = 30.5" --> circumference = 95.82"

Worn Diameter (assuming the 12/32" of tread depth worn off on both sides) = 29.75" --> circumference = 93.46"

Assume the wear on the drive train other than tires is negligible.

Percent error = 1 - (93.46/95.82)*100 = 2.46%


This means that you'd need a GPS unit that is consistently within +/- 2.46 ft of accuracy to be more accurate than calculating it using the ODO.

_________________
'06 CRD
Frankenlift II, 245/75/16 Goodyear MT/R's on Moabs, Samco Hoses, Provent, Mopar iPod Integration Kit

Accurate and precise are two different things. The odo is not as accurate as my GPS. It is however, precise.

By that I mean the odo is using a mechanically precise mechanism without much variation-- whereas the GPS has much more.

The GPS is, however, much more accurate than the ODO.

At least on my vehicle (with 245/75/16 Revos). I have driven the same course with the Jeep, with my car, and with the Jeep and the GPS (around 102 miles). The GPS and the corolla agreed to within 1/10 of a mile over the 102 mile distance. Those numbers matched the distance reported by Google earth/maps. The Jeep numbers did not agree at all-- it was under by a little over 10%. Now when I figure my mileage, I just add a 10% percent fudge factor. It is not perfect, but better than the original odo miles. If anything, it is still low. I check it with the gps every once in a while as well and it is still way off. Mile markers show it to be off as well.

My odometer is off by 6%. I have no idea what accuracy a typical GPS has, but I just wanted to make it clear that the typical is not '1%' on our odo's. 6% is very common, and I believe some people have even more due to non-stock tires. I just calculate the difference by hand(well, in my head) but I don't think our odo's are calibrated correctly in general.

_________________
2006 Jeep Liberty Sport CRD

I do not want to carry this discussion too far away from the original topic so I will only add this. It is better to be more precise than accurate. Precision will allow repeatability. My hand held gps unit stated not to use it for navigation (haha right?) and this is because it can not assure accuracy due to the variability in satellites, and to always carry maps since it is not a direct replacement for hard copies of maps. Always remember depending on your location relative to available satellites you will see large swings in accuracy in any GPS unit. I can tell you as I stated before, my hand held more times than not is +/- 18 ft due to only having X number of satellites available to bounce signal off of (now this should get better with the summer coming for us in the northeast) which means draw a circle 18 ft in diameter around me, the GPS can only say I'm within that 18 foot circle. And keep in mind that this error is introduced at every data point taken along your route or path. This is perfectly fine when you're hiking or driving since you don't need a high degree of accuracy since you can use your other senses to locate your self, but it is not a reliable measuring tool unless you spend high dollars to gain the high degree of accuracy and precision. Using your GPS to confirm the mileage against your car does help to fuel the argument that the GPS is an accurate measuring tool, but I'm only speaking from seeing the error on the hand held that I'm not sold that if t says you went a mile, you actually went a mile. The only way to actually check that is to calibrate is against something more accurate than a mile marker on an interstate. One last thing, due to the swings in error, one day your mile could measure 1.05 miles on the GPS and the next it measures 1.10 miles, again based on number of satellites available.

_________________
'06 CRD
Frankenlift II, 245/75/16 Goodyear MT/R's on Moabs, Samco Hoses, Provent, Mopar iPod Integration Kit

Pumped up the tires 7 pounds to 40 now that the mud in the driveway has hardened up to near solid.
Do not need the extra footprint.
4 wheel drive is not needed much either, but the holes in the road sure do slow me down.
The fuel tank is seeping around the top when I top her off, warranty work for when I put in the lift pump.
Let us see, yes, the goal is over 30mpg. When I bought the thing I said 20 to 30 mpg. 20 towing the Airstream, 30 on cruise, going fishing.

R

_________________
'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms