Grand Cherokee CRD - naff fuel consumption!

[IceBoy]

Hi All,

I can also confirm the bad fuel consumption on these !

I had a loan when my Grand Voyager 2.5 CRD was in for a major service.

Gues what....the grand voyager with the old engine returned low to mid 30's and the Cherokee with the auto box (2006 model) was low 20's !!!!

IceBoy

[markcjd]

Beefmeister said:

markcjd said:

I have had 17 CRD WH grand cherokees

You've owned 17 of them?

How so?

Edited by Beefmeister on Thursday 1st October 16:41

Had, not owned. Company cars/demonstrators.

[Scuffers]

IceBoy said:

Hi All,

I can also confirm the bad fuel consumption on these !

I had a loan when my Grand Voyager 2.5 CRD was in for a major service.

Gues what....the grand voyager with the old engine returned low to mid 30's and the Cherokee with the auto box (2006 model) was low 20's !!!!

IceBoy

that's the VM POS engine again....

the Merc 3L is a good engine, just not very economical (as dismals go)

I used to run Jeeps all the time, went though 15 of them over the years, but NEVER had a dismal, only 4L then 4.7L petrols.

[shortshift]

Thanks for all the good advice. Calculated actual MPG based on a full tank using plug in sat nav to check distance and got 28.8 over a 3 day mixed run. Much happier The dash read out is showing 19.6 mpg! Guess it's either faulty or screwed!

[nav18tor]

I ran a 55 plate Grand Cherokee with the Mercs V6 for 60,000 miles

My work is mostly distance but I don't hang about, average mpg on the trip computor was 32.9 but this is US gallons and the Jeep was chipped

Chipping gave me 10% increase overnight as well as close on 280BHP and a mountian of torque

This equates to close on 39 UK MPG!!!!!

Keeping the tyres at the right psi, servicing and using fully synth, got a 2.5t 3.0L V6 diesel up to the high 30's

The dash read out is in US MPG and most seem to forget this simple fact

I now run an 08/08 Alfa Romeo 159SW with the 1.9 JTDm diesel and I am going back to a Grand Cherokee asap, not becasue the Alfa is bad, far from it it is a good car, just not big enough and no auto gear box or decent cup holders!!

[crofty1984]

MadmanO/T People said:

The old box-shaped Cherokees used the Italian built VM diesel engine. This was before the Daimler-Chrysler merger. Newer Cherokees use a Merc diesel.


Cheers,
Madman of the People

I had one of them. Thirsty bugger it was! But then again the fuel tank did leak.

[The Wookie]

shortshift said:

Thanks for all the good advice. Calculated actual MPG based on a full tank using plug in sat nav to check distance and got 28.8 over a 3 day mixed run. Much happier The dash read out is showing 19.6 mpg! Guess it's either faulty or screwed!

Well 19.6 MPG(US) is about 24 MPG(Imperial), so there's still a significant discrepancy if it were using US gallons... odd

[Deva Link]

nav18tor said:

My work is mostly distance but I don't hang about, average mpg on the trip computor was 32.9 but this is US gallons and the Jeep was chipped

Are you sure that was US Gallons? Even 32.9 is good - 39 would be amazing.

Bear in mind that chipping also messes up the mpg computer (it doesn't measure MPG at all, it calculates it from injection cycles with a known quantity of fuel injected).

[crofty1984]

BERGS2 said:

Have just got hold of a 2.5TD Old shape cherokee

I thought it was a renault lump?

not expecting great shakes in fuel consumption, but given the 4.0 would return mpg in the teens - it shouldn't be quite so thirsty...

No, it's a 2.5 litre Italian VM lump. And you might get 25mpg. the pisser is that at 40mph (a lot of my commute at the time) you're right between 2 gears. Any kind of need for power in the high gear and you're buggered, but you're revving it's tits off in the lower gear.

[nav18tor]

Deva Link said:

nav18tor said:

My work is mostly distance but I don't hang about, average mpg on the trip computor was 32.9 but this is US gallons and the Jeep was chipped

Are you sure that was US Gallons? Even 32.9 is good - 39 would be amazing.

Bear in mind that chipping also messes up the mpg computer (it doesn't measure MPG at all, it calculates it from injection cycles with a known quantity of fuel injected).

Will be checking with sat nav soon, but most days (unchipped as yet) am getting 29-31 mpg on trip computor (mostly motorway @ 70-80 mph) which equates to 35+ mpg

This is my second Grand Cherokee with the Mercs V6 Diesel motor and I love them as they seem to suit how I drive and the roads I drive on

All local work this weekend, and am showing 27.5 mpg on trip which = 33UK mpg

[FPC]

I've got a new Grand Cherokee and I seem to get about 23mpg mixed driving. That's on the trip computer and when filling up. It is a Merc engine. Jeep also uses a VW 2.0 diesel and a VM 2.8 in its other models.