I am at the mo lookin to buy a Multipla JTD ELX and am getting a little worried at the mpg some of you are getting.Most adverts for JTD ELX bragg about getting 50mpg, is this not the case ?


Very useful tool to work out mpg.

http://www.geocities.com/mpgcalc/

We get over 50 mpg most of the time in out 51 plate JTD. Even towing!

Kate

I've just done a brim to brim test on our 52 JTD 115 over a 580 mile trip to see the grandparents, mainly motorway at (the best I could manage to) a steady 70, but with some bits and pieces of town and A road.

The cars computer gave me an average of 35.4 mpg, which I was not happy with! but when I filled up I found that I had used just under 13 galls, which gives 44.7mpg, which is much better!

All I have to do now is remember how to add on 26% in my head and I can keep track as I drive!

The best mpg I have had on the trip computer was 40 when I set it as I joined the motorway and checked 200 miles later when I came off. So that would be an actual 50.5 adding the same percentage on.

It was mentioned earlier that if you use US Galls it works out about right - has anyone asked Fiat (head office rather than a dealer) if they did use US galls, as most people seem to get a similar error?

John

disgusted said:

Hi Mulipla Forumists.

How accurate do you consider the MPG readout of your Multi?

Has anyone out there been exacting enough to compare the readout with a reasonably scientific series of brim-2-brim checks?

I have just fitted the roofbars & roofboot prior to the holiday trip. Driving around the M25 a couple of times (rush hour, but fairly easy traffic) I'm reading 50.2 mpg (JTD 110).

I don't expect such good figures when we hitch up & tow.

What are your experiences?

Click to expand...

My JTD ELX(105bhp) returned 50mpg, as have my last two Eleganza(115bhp)

I was quite shocked to see the computer showing 29mpg on our Multipla, so I kept a note of how many litres of fuel we were filling up with, start and finish mileage, etc and it works out we actually get 40mpg (been monitoring for about 3 months), which I'm happy with as most of the driving is through 30 to 40 mile an hour restricted villages.

We've not really had our Multipla on a really good run yet but I'm confident the mpg will drastically improve on a longer motorway run.

P.S. I'm a newbee to the forum and would like to wish all fellow ugly bug owners all the best in their Multipla experience. Hopefully I will give you a flash if you are ever visiting north Yorkshire.

Hello, all.

I'm just new here and also interested in differences between MPG showing on board computer and the real one.

I use l/100km, but after conversion I get almost the same difference as some of you (BC shows 5.2 l/100km - 45.2MPG, I get cca 6.5 l/100km - 36.2MPG). For conversion I use google.com, you can enter something like "6.5 l/100km in mpg" and it will convert it correctly - and it can convert many others.

It is very nice to log your fuelings at www.spritmonitor.de (also English interface), where you can write down not only fuelings, but also many other expenses, taxes, refunds etc. And you can also compare your consumption with other drivers having the same car.

It is also possible to show the current consumption in you signature (or in your profile) at the forums like this (on others it works for me, but on this one, I get just link to that picture - can you help me? ).

PS: Sorry for English, I'm not a native speaker.

I get from 37mpg town mpg to about 45mpg at @ 45mph country roads, which is pretty amazing considering the size and weight of the pretty rhino ELX JTD 115 thing. I trust my mpg readings now, I don't think they are pessimistic, if anything they are either spot on or optimistic, long live the 1.9 MULTIJET!
My Strada Abarth did 28mpg and my Fiat X1/9 did 26 mpg. But carbs did sound good, it was probably the sound of waste!

2 years on & this thread is still going strong!

My Diesel Multi (bought new in 2001) should reach the 100,000m point this weekend on the way to Dover for an eating & shopping in France weekend.

I will also get some cheap French diesel (if it still is).

My Multi regularly returns 45mpg on runs, when taking a brim-to-brim check, it shows that the computer is still a bit pessimistic (maybe 5%).

recently got just over a 1000 km out of a tank of diesel,mainly motorway at an average of 110kph thought this was quite good

Hi, thought I would stick my data down as well 2002 JTD 110 - computer shows between 29 (bad day) and 36 (good day). I am one of those that resets the meter every time I fill up so know exactly how many miles I get out of my tank of diesel and I have worked it out manually as being an average of 44 MPG (UK).

Virtually all of my driving is urban so really pleased with this for a car that basically has the aerodynamics of a house brick on wheels.

MPG figures do seem a bit hit and miss. Filling to the brim, going for a mixed run (hills, back roads and main roads) for 109 miles then filling to the brim again at the same garage, I got just over 50 mpg, but the fuel consumption figure on the dash gave me 41 mpg. In practice, the only way the engine computer can measure mpg is to meter fuel used and compare this to road miles covered. The computer presumably adjusts for whatever gear you're in, but reducing the tyre diameter by just a few millimeters wear is going to significantly alter distance covered per revolution of the wheels. Thinking about it, this should make mileage readings over optimistic; going by what I've read here it seems the other way, with dashboard readings showing lower mpg than people are actually getting~~~~~~~~~ Strange

A visitor here from the Doblo forum with a possible explanation..........

Whilst it seems crazy that Fiat could have used US gallons rather than Imperial Gallons, it could be so....

99.9% of their effort and checking will have gone on litres and km for continental European Countries. You can image the junior intern being asked to sort-out the gallons and miles for the British owners, and he/she consulted Google and got the US conversion by mistake? Then they all went for a pizza and a glass of red and have never looked back!

It does seem odd. Doblo computers tend to be optimistic by about 8%.

Just a thought!

Well I have had many Fiats and Alfa's - currently have a Panda Multijet and that seems to have an accurate trip computer (last brim-brim was 61MPG and trip was saying 60.8! mixture of town and busy A34 Oxford dual carriageway driving) - My Alfa 156 16V JTD 150 seems to be a bit optimistic it says 50 MPG and equates to around 46MPG on Brim to Brim - I am about to buy a Multipla Multijet so will let you know on this one! My previous Petrol Alfa 147s have been pretty close with trip readings - but it does seem the only true way is to get your calculator out and do the brim to brim workout! Simple rule of thumb if you do say 500 miles and use 50 litres thats around 45.6 MPG if you use more then it's less if you use less thaen MPG is better i.e. knock a nought off the miles figure (divide by ten) and thats the litres you'd use to get around 45.6MPG use more it's worse use less it's better. Hopefully that's as clear as mud!

disgusted said:

Hi Mulipla Forumists.

How accurate do you consider the MPG readout of your Multi?

Has anyone out there been exacting enough to compare the readout with a reasonably scientific series of brim-2-brim checks?

I have just fitted the roofbars & roofboot prior to the holiday trip. Driving around the M25 a couple of times (rush hour, but fairly easy traffic) I'm reading 50.2 mpg (JTD 110).

I don't expect such good figures when we hitch up & tow.

What are your experiences?

Click to expand...

Like many others, my Multipla regularly has a fuel economy read-out of 34-35 mpg, when brim-to-brim fill measurements suggest 40-41 mpg is closer to the mark. Most contributers seem to presume that the issue is with the fuel economy read-out, but while I do not claim to understand how the electronic systems operate, isn't it just as likely that there is a problem with the trip clock measurement? Has anyone carried out a test to verify that the distances actually covered by the car are accurately reflected in the trip read-out? If the problem is with the latter, there would be much wider ramifications than just an inaccurate fuel economy display. For example, service schedules and more particularly, warranty claims may be affected. I read recently that Honda had a significant difficulty with this issue in the States. (If memory serves, a bloke discovered that according to his new Honda the regular two hundred mile trip he had made to his mother's home for years suddenly became a two hundred and thirty mile trip).

Mine's a Multipla JTD, why do a brim to brim ?.......every time I fuel up I put in exactly 5 gallons, this way you travel lighter and you can check on your fuel consumption more often. My mpg readout is in US gallons and is spot on when I convert it to Imperial. I have noticed an improvement since I've had the cruise control fitted.
I have a friend at work that has a big 4x4 thing a tucson or something , his is also calibrated in US gallons, I don't think it's because the vehicles are marketed for the US though.

Well...i thought you were all mad!!! My 52reg Multi 115JTD ELX shows between 38 at 80MPH to 42 at 60 to 70 MPH - i do mainly motorway tunning. I thought that was excellent for the size of the beast, which we love.
Now the diesel price has gone up....and i am more aware of my speed and ways to economise. So whilst i always go to nearly empty then fill up, i have never done the miles /fuel used calculation.
This last tank i did. Managed over 700miles for a full tank...doing 60 to 70 on the back roads, 70 on the motorway. I always have driven reasonably fuel friendly.
The calculation shoed 54 MPG......but the computer showed 43.....
Now i am confused. Sure...over 700 miles to a tank is very good....providing the mileometer thingy is acurate.
What to believe now.....
Mal

Ive been reading this thread with interest, my 2002 110 (new to me on sunday) is giving horrendous readings of between 27 round town to 36 on a short run (60 on an A road but only about 5 miles).
My driving style will probably not get me any endurance records as far as MPG goes, but wont get me any points either! Mostly urban mileage and a fairly "average joe" driving style.
Ive only done 30miles or so in it so far and i realise I havent really done enough to get a fair view of the cars consumption plus there will have been a few cold starts over that period.

Ive just filled it up so I will be checking the consumtion by the tank to make comparisons with the computer.

I have a couple of questions-

Firstly, how is the MPG calculated? Is it an average of the previous 5 miles consumption or so (like my old SAAB), or is a much shorter distance or for that matter instantaneous?

And secondly, Is there any particular fault that would increase fuel consumption that I should be checking for?

The cars got 47/48k FSH tyre pressures good, but the car is admittedly due a service. The air filter is however very clean on face value and the car is running very well, no smoke etc.

My newly acquired 8v 115bhp 1.9JTD Eleganza returns around 35mpg for London driving.

On a motorway run it averages 53mpg.

OK, I guess mine must just be too old to have this stuff on the trip button. It's a 2000 JTD but has a pretty good trim spec. A/C, C/C, twin sunnies etc...
My trip button just cycles through Time, trip milage, total milage and OAT.
Bugga

Hello - Im New!

I was going to ask the same question as i have a JTD 115 and on a trip of over 250 miles, it barely touched 40 mpg? is this right? i was expecting 50!

If anyone can give any advice, id appreciate it!

Kristof