1.4 fuel economy town driving mostly

[coolmint]

Hi , checked the mpg on a 2013 1.4  with 10000 miles and was surprised that I was only getting 36.5 miles to the gallon . Car is used for a lot of town driving , short journeys and stop starts, aircon on  , thought I should be getting at least 40 mpg. Does this sound right or should I get it checked out with the dealer ?  Car was tested on a long run , 150 miles mostly motorway at 70 mph and did return 48mpg on that trip .

[Garyman]

Thats sounds about right to be honest.

You said yourself a lot of town driving and stop start, and car returned 48mpg on longer runs

[madasafish]

I run around town but mainly 10 mile journeys.. average 42mpg so your figures sound right.

When cold and the coolant temperature light is on, 30mpg is likely best. Add a few hills.. and it could be 35mph even when warm..

The EC tests are just pie in the sky: all you get is flat running with a warm engine.. In the real world, stop/start driving is a killer.

[Eddie Honda]

Sounds about right.

I was getting 50+ trundling to work and back (27 miles, A and Motorway)

Wife is using the car regular to nursery - 9 miles each way, stop start. Getting as low as 40.

I did read somewhere of someone doing 3 mile local trips and barely warming up - 33.

[Hobo]

Just got back yesterday from a couple of days away, 800 mile round trip nearly all motorway, cruise control set at 70 mph and averaged 49 mpg.

[peteo48]

Being a bit of a nerd I keep records of all my fill ups and calculate my mpg using the brim to brim method.

I am currently on 41.3 mpg over 3,800 miles or so. I do a lot of town driving with the odd bit of motorway driving.

Last winter I went as low as 34.4 on one fill up but I have got over 47 when the tank has included a longish trip.

I reckon your figures are about right.

Incidentally, Which (I think) estimate that the combined figure given for most cars is 19% out on average. The Jazz is supposed to do over 50 mpg so I reckon 41 (ish) is pretty much realistic.

[Eddie Honda]

Being a bit of a nerd I keep records of all my fill ups

  See my link below my avatar. 

[applicationcen]

I rarely get more than 32 reported on the read out in a very hilly urban Torquay.

Mind you Ill put a writing pad and pen in the car to make proper notes - and do the brim to brim over say 100 mile reps to see what the real world can add to this question.

[peteo48]

Being a bit of a nerd I keep records of all my fill ups

  See my link below my avatar. 

Hi Eddie - I am currently using fuelly.com , a similar on-line tool. I like the graphs on the fuelly site.

[Eddie Honda]

Another good site Pete - I'm a little behind with logging my receipts at the minute...but the Jazz is fairly up-to-date.

[Defender]

My overall average is mid 40's, I did notice a drop during the time when I was using my motorcycle for work, so the proportion of shorter and local journeys was much higher.
I have also noticed a drop since the weather has cooled down and I've changed over to the winter tyres.

[peteo48]

My overall average is mid 40's, I did notice a drop during the time when I was using my motorcycle for work, so the proportion of shorter and local journeys was much higher.
I have also noticed a drop since the weather has cooled down and I've changed over to the winter tyres.

Yes, the drop in mpg at this time of year is an annual event. Even worse if you do lots of short journeys because your car rarely gets to full operating temperature.

Don't use winter tyres (my small mileage and living in a town doesn't really justify it otherwise I'd have them) but guess the softer compound must increase rolling resistance?

[guest907]

I have found 2 things on my Jazz cars:-

1. the fuel consumption increases from 15K miles and above...always better after a service also.

2. Fuel consumption suffers in the winter when the ambient air temp is cold (without the wind chill as you are speeding along!)

[guest5040]

Well, I have had my worst MPG from my Jazz as I have been driving around Plymouth to and from work (4 miles each way) from my last fill and achieved 33.1 mpg (Trip computer shows an average speed of 15 mph for the period). Normally I have at least two runs to Exeter per tank and my average is about 45 mpg.

[applicationcen]

1. Out of interest how accurate have people found the Jazz's trip computers mpg statements when compared to actual mileage/gallon? (My previous Legend was hopeless)

2. Is there  a configuration that you can change to get it to read out in Miles per Litre?

Well, I have had my worst MPG from my Jazz as I have been driving around Plymouth to and from work (4 miles each way) from my last fill and achieved 33.1 mpg (Trip computer shows an average speed of 15 mph for the period). Normally I have at least two runs to Exeter per tank and my average is about 45 mpg.