I have absolutely noted an opposite relationship of mileage as compared to speed once you have shifted into the 5th gear. (I am not the first to note this)

K

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'06 Midnight Blue CRD Sport
Born 5-06
Mopar Skids and Tow Hooks
Deer Killer Mod

My best tank was 24.5 but my worst is about 20.5 for mostly highway. I have never seen the mileage I thought I should get on all highway driving.

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Feb/2006 Silver Sport 4x4 CRD

Our last three tanks have been 17/18 MPG in city only driving, with an average of 7 miles (12/13 minutes) before engine being shut off for 5/10 minutes (daycare stop) then on to the college for about 7 more miles, then through in some Wal-Mart or other stops. About the same time I did the ORM, I switched from 49 Cetane B2 LSD to 47 cetane ULSD and dropped from 21/22 MPG's to 20/21 MPG. Then I switched to local rot-gut BP 42 cetane ULSD and we are now down to 17/18 MPG, this was all on winter fuel except the last tank, so that is part of the problem. I will switch back to the 47 cetane ULSD this weekend and see what happens, I am expecting the MPG's to jump back up. Hope I'm not disappointed.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

And I thought 20mpg was bad! WOW! What are you guys doing to get below 20mpg.

I drive 13 miles one way to work in stop and go rush hour traffic. There is a stretch of maybe 6 miles that is interstate where I can run 70mph. I get 20mpg.

The only highway trip I took I didn't use the entire tank. It was a short trip and I logged 24mpg that tank.

My last tank, I towed my motorcycle using my 5'x10' utility trailer and made every attempt to beat the CRD silly. Full throttle runs up to 80 or 90 towing a trailer, stop and go...again, towing a trailer. For about 90 miles towing the trailer, I was about as hard on the CRD as I could be. The rest of that tank way my usual commute to work. Still got 20mpg.

My current tank of fuel is showing a little more than half a tank left, and I'm already at 250 miles on the tank. Granted, in my daily commute, I can't lead foot it much, and even if I could, it's a 4000+lb SUV...not much fun to drive fast...it's more of a "cruiser".

The first tank I ran was ULSD from the local Shell. 20mpg.

From there out, I've been running B20. Haven't noticed any mileage or performance change. The first couple of tanks I ran Power Clean in, but stopped using it before this tank.

I'm running the ORM, which lowers intake temps a great deal, and gives the engine a little more punch off the line. I was running the EHM, but I put on a Provent day before last. My CRD is coming up on 11,000 miles, and so far, it's everything I expected it to be. I'm loving it.

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Chad Hargis
Nashville, TN
2008 Grand Cherokee CRD
2005 Liberty CRD *SOLD*

After 44,400 miles with about 80% highway, 20% city I'm averaging about 23mpg. I'm a little disappointed in the mileage I'm getting, but it's better than a gasser.

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2006 Liberty Limited CRD Bright Silver Metallic (NOW SOLD)
All Recalls Performed
100k extended warranty
Fumoto Oil Drain Valves (Oil Pan & Transfer Case)
V6 Airbox Mod
New Driveshaft, New EGR
2003 Wrangler Sport 4.0L, Bright Blue
2007 Wrangler Sahara Unlimited 4 Door, Red Rock Crystal Pearl WOW!!!

I found the mileage jumped three mpg in mixed driving after I cleaned the MAP sensor. it was packed solid with dry soot. I (my wife) usually average around 22- 24 mpg, highway biased 70-30%

I ran an 800 mile test from home to Seattle and back, ORM and #2 BP USLD on the way back, and stock, B20 there, got 28mpg both ways per the overhead gizmo. We are thrilled with our CRD, it pulled a 2 cubic yard load of soil in the trailer without complaint, guessing around the max rated towing load.

the mixed results from our other car, a 93 volvo non turbo four cylinder is about 22 mpg, and can't tow, wheel, or drag race well, and has very small inside dimensions while being longer than the libby.

I'd like to get another CRD of my own that I could lift, get dirty and shun dealers with, while the wife drives hers, but that probably will never happen......oh well.

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'05 CRD limited, SEGR, EHM, Magnaflow 18" muffler, OEM skid plates, bug guard, trailer kit, yakima cross bars and basket, CAT filter,
....more to come.....

I finally got 21 MPG with an ORMish reading. I still think my MPGs will improve because I haven't broke 10K miles yet and hopefully the engine will be finished breaking in (one can always hope).

I used to only see 19 MPG with any type of use, highway/city or 4x2/4x4. I really do like a vehicle that gets 19 MPGs when in 4x4 hi and running the desert.

If you're getting a CRD for economy, one must factor it against other SUVs of the same size, that is where it seems to shine. I know someone that just bought an FJ Cruiser, and they said they get 19 MPGs, but it is suppose to run on premium.

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2006 CRD Sport

Know a local individual who is getting 19 MPG highway, but as you say, they have to run premium. They tried midgrade for a while and MPG's dropped to 17 MPG and the FJ would diesel often when shut off.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

I am a newbie to the CRD forums as I just purchased my 05 White Sport with 26k miles. What exactly is the ORM mod?

Go here then about 1/2 way down the topic: http://www.lostjeeps.com/forum/phpBB3/vie ... hp?t=15249

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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

oldnavy,
It seems that there are two classes of mpg performance, a group that gets 24/25 in town and around 30 mpg on the road, and a group that gets 20/21 in town and 25/26 on the road. Assuming that the fuel economy is based on actual calculations not EVIC, there must be a common difference such as a FVC, dragging brake, or less efficient than normal transmission. I have installed a Aero 2525, keep the stock tires at 40 PSI, use Power Service @ every other tank, drive very smoothly in town and on the road and have never averaged over 26 mpg on highway miles driving 68-70 mph. My 05 has 22k and the only thing I have done that could adversly impact fuel economy was the addition of a LSD(trac lock). There could be a common problem based on the way people report their fuel economy. If anyone has observations I would like to see them.

Lewis

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Mail Rated 2005 Red CRD Sport with large rectangular hole in top right behind the EVIC and above the heated leather seats.
2004 Jetta TDI

There are sooooo many variables that I am not quick to think that there are mechanical variabilities. Human variables about driving habits and maintanance, and then fuel quality. I am almost inclined to think that fuel quality even outweighs the many human issues. Having gotten medocre fuel, really cruddy fuel (that threw a CEL!!!), and winter fuel, and even wider variations in biodiesel, I certainly feeel that fuel is a big big issue.

Plus, hills vs flat. I notice that the flat-lands (eg TX, midwest) seem to report better mileage than east coasters or those in the ranges. Or it could be that us east coasters are very cranky.

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2005 Liberty Sport CRD w/all the fixings
Elephant Hose, MAF (ORM), Amsoil Airfilter, nice when I get to drive it
1 EGRreplacement, but never again.
99.5 FrankenJetta TDI (R.I.P.): being turned into diesel hybrid!
99.5 Replacement Jetta TDI: deal of a lifetime, EHM, some other stuff

I also think fuel quality plays a very big part. I just wish I knew what I was putting in before I fill it up Many past diesels ran very good on Meijer brand fuel as does the KJ but some tanks are better or worse then others.
I also believe later KJ's came with differnt parts and programming that give lower mileage from the git go. MINE
With just 7500 miles and all in town short trip driving, 1.5 miles to pre school, 8 miles to wal-mart, 6 miles to Harbor Freight and Home depot My last tank was 21.5 mpg. That's way over the 99 kj's 12 mpg for the same type of driving. I took one short weekend trip of 400 miles and got 24.9 mpg. Lowest last winter was 18 mpg.

Also note the AC runs in any vent position clockwise of the 11 o'clock. (dash vents=11 o'clock) regardless of weather the AC button is pushed in or not. This has to make a big difference in mpg's. There's a thread here to eliminate that "feature".

As for CU, they can't even be relied on to get a infant/child test right. I personally think it's a magazine for Lemmings. They have always given diesels a bad rating and I wonder what they will say about their beloved honda's upcoming diesel

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

Just filled up again at 525 miles. Averaged 27.7 mpg in about 70% highway and 30% city. Diesel is 30 cents less than unleaded gas - life is good.

Only averaged 22 to 23 before ORM. Have added aero 2525 muffler and just got an Amsoil Air Filter.

Looking forward to my next full highway trip to see if I can break 30 mpg.

Convinced the ORM made the major difference. Plugged it back in once and I could immediately feel the performance loss.

If you really want to feel some performance take the air filter out. Several months ago I went in for service and the tech forgot to install the new
filter. They called and I went back to get it the next day, but the performance boost with out it was great. My new Amsoil that I installed yesterday seems to give me a little boost, but I really can not feel that much.

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VACRD
2006 CRD
AeroTurbine 2525 Muffler
FUMOTO, SAMCO Hoses
GDE Eco Tune, Euro Torque Con
New Fuel Filter Unit
2009 VW TDI

which brings me back to the bigger-airbox thing.

If I had a month of time and half a brain I'd build my double-filter airbox idea. sigh.

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2005 Liberty Sport CRD w/all the fixings
Elephant Hose, MAF (ORM), Amsoil Airfilter, nice when I get to drive it
1 EGRreplacement, but never again.
99.5 FrankenJetta TDI (R.I.P.): being turned into diesel hybrid!
99.5 Replacement Jetta TDI: deal of a lifetime, EHM, some other stuff

A clean air filter's pressure drop is a pretty small resistance in an intake system with a turbo having a maximum boost of 26.5 psi.

[quote="Joe Romas"]
With just 7500 miles and all in town short trip driving, 1.5 miles to pre school, 8 miles to wal-mart, 6 miles to Harbor Freight and Home depot My last tank was 21.5 mpg. That's way over the 99 kj's 12 mpg for the same type of driving. I took one short weekend trip of 400 miles and got 24.9 mpg. Lowest last winter was 18 mpg.

Also note the AC runs in any vent position clockwise of the 11 o'clock. (dash vents=11 o'clock) regardless of weather the AC button is pushed in or not. This has to make a big difference in mpg's. There's a thread here to eliminate that "feature".
[/quote]

i think you mean a '99 xj. i get the same mileage that you do with a gasser. and i drive in the mountains, which someone said is where you get the worst mileage.

i believe the A/C works in any position other than either the upper vent only or the one that uses upper and lower, i forget, saw that in another thread. but then again i dont have an "A/C button".

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Admin note:
This account has been deactivated.

We also have a recirculate position. Upper and lower position is stright up and does use the AC

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

I think pump calibration has something to do with it too. I swear, I got robbed yesterday.

I did 507 miles, almost all interstate with the cruise control on 70mph. I decided to pull off for fuel with about an 1/8 of a tank showing on the gauge. No low fuel light or anything. Just playing it safe.

The pump said I put in 20.3 gallons....in a 20.5 gallon tank that wan't near empty!!??!! What's up with that?

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Chad Hargis
Nashville, TN
2008 Grand Cherokee CRD
2005 Liberty CRD *SOLD*

I have pumped in 22.7 before...there is "supposed" to be some air space and you are not "supposed" to fill up the neck

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Founder of L.O.S.T.
2006 CRD Sport
Mods: GDE Hot Tune w/ 364#@2000rpm/Air Box /3" Str8 Exhaust/ASFIR Alum Skids/245-75R-16 Cooper STT PRO/OME LIFT w/Clevis & 4 Spring Isos/AirTabs/Rigid 10" S2 LED/4xGuard Ctr Matrix Bumper
Drag Strip:Reac=.1078_60ft=2.224_1/8=10.39@64.8mph_1/4+16.46@80.8mph