General Multijet Round-Trip MPGs

[306maxi]

This is the thing - I've run mine 30 miles past the range going to '---' and still only managed 31 litres in the thing, that is to fuel sitting right up ths spout.

Weird. Well of course mine is a petrol so there could be differences, would have thought they'd use the same tank but apparently not! Mine takes about 35 litres from empty till when the pump stops and you can get another couple of litres in just by letting it settle down, then for the last 5 you have to pull the nozzle out of the filler neck, takes ages but IMHO the extra range is worth it. Usually get 120 miles or so before the first segment goes out on the fuel gauge

 

[loveshandbags]

On a recent trip down the country I brimmed my tank squeezing as much juice into as possible. I had expected that it would do a round trip of 320 miles but encouraged by the ‘sweet spot’ in the 1.4 burned up a bit more juice than I had planned. On the return journey having clocked 280 miles when the numbers on the Range went out (30 miles left) the average consumption showing was 39 mpg.
So for 280miles divide 39mpg = 7.179 gals x 4.55 litres = 32.66 litres
30 miles left = 0.769 gal = 3.5 litres left
Total 36.16 litres capacity
Allowing a 3% inaccuracy on the ‘speedo’ = 1.08 litres extra ‘used’.
Getting a maximum capacity of 37.24 litres.
Fiat quote 35 litres tank capacity but that would exclude the ‘neck’ and the fuel in the system but I have heard of some individuals getting 7-8 litres into their cars over and above the quoted tank capacity.

After reading this I wouldn’t be letting my car run out fuel particularly if it’s a diesel. (I did it once )

 

[jrkitching]

...I am VERY jealous of the figures jrkitching is getting out of his car...

Patience is the key. It's not something you're going to achieve quickly.

 

[306maxi]

Patience is the key. It's not something you're going to achieve quickly.

It's not patience I need though. I think over that tank I lost maybe 2 mpg driving in Manchester in some traffic, it's just the tyres, in my experience they cost about 10% in fuel economy. Seriously, when I put my winter tyres on the car feels like it's gained an extra 5bhp and it just coasts much further, driving in my local area I can like any serious eco-driver, life off to arrive at a corner or roundabout at a safe speed, but the day after putting the winter tyres on I'm constantly arriving just that bit faster than I would usually.

 

[loveshandbags]

It's not patience I need though. I think over that tank I lost maybe 2 mpg driving in Manchester in some traffic, it's just the tyres, in my experience they cost about 10% in fuel economy. Seriously, when I put my winter tyres on the car feels like it's gained an extra 5bhp and it just coasts much further, driving in my local area I can like any serious eco-driver, life off to arrive at a corner or roundabout at a safe speed, but the day after putting the winter tyres on I'm constantly arriving just that bit faster than I would usually.

1. I've seen guys over-inflate their tyres which is a no-no. If there's an accident I have heard of assessors checking tyre pressures.
2. Your W***** wheels - surely these will have more rolling resistance and after the All season dry braking test I wouldn't be happy with the 4M over run at 60mph.
3. A set of smaller wheels along the same lines as JRs.:idea:
4. Sell your multispokes to me.

 

[306maxi]

1. I've seen guys over-inflate their tyres which is a no-no. If there's an accident I have heard of assessors checking tyre pressures.
2. Your W***** wheels - surely these will have more rolling resistance and after the All season dry braking test I wouldn't be happy with the 4M over run at 60mph.
3. A set of smaller wheels along the same lines as JRs.:idea:
4. Sell your multispokes to me.

1. Overinflation is just dumb
2. Compared to 175 summer tyres they might have more rolling resistance but compared to 195 summer tyres they are far far far slipper. Remember the width of tyres and wheels is part of the aerodynamic drag on a car also.
3. I would love to try a smaller set of wheels out for a couple of tanks just to see what they're like, but IMHO I'd rather have the extra grip than the economy
4. Nope

 

[loveshandbags]

1. Overinflation is just dumb
2. Compared to 175 summer tyres they might have more rolling resistance but compared to 195 summer tyres they are far far far slipper. Remember the width of tyres and wheels is part of the aerodynamic drag on a car also.
3. I would love to try a smaller set of wheels out for a couple of tanks just to see what they're like, but IMHO I'd rather have the extra grip than the economy
4. Nope

Well I glad that you decided that safety i.e. better braking distance is more important than 3 miles extra to the gallon .
I suppose I'll have to get my wheels refurbished then.

 

[306maxi]

Well I glad that you decided that safety i.e. better braking distance is more important than 3 miles extra to the gallon .
I suppose I'll have to get my wheels refurbished then.

Tbh i keep my distance from other cars Nothing to be gained by tailgating other than stone chips

 

[jrkitching]

...Nothing to be gained by tailgating other than stone chips

If you look closely at other cars as you walk past, you can tell the careful drivers by the stone chips, door dings & wheel scuffs they haven't got.

 

[306maxi]

If you look closely at other cars as you walk past, you can tell the careful drivers by the stone chips, door dings & wheel scuffs they haven't got.

Definitely. in almost 28k miles the 500 has a tiny barely visible scratch on each side rubbing strip, a tiny little ding on the end of the drivers side rubbing strip and maybe half a dozen smallish stone chips on the front. There are zillions of stone chips on the front of the rear arch, doens't seem to be much you can do about that.

 

[loveshandbags]

Tbh i keep my distance from other cars Nothing to be gained by tailgating other than stone chips

I posted this before but because of a previous incident I put a high value on being able to brake quickly. If I ended up with a set of 'Eco' tyres I would have to downsize the engine to a 1.2 so that I would drive like the way I do in the Marea.

This topic is a bit a ‘pet’ area for me because of an incident in 1999 in a MX5. Going home around 11.30pm on a Friday night after a ‘corporate’ function - a guy with some ‘bird he had picked up’ pulled out from a side road in front on me. No-one hurt, some car damage and the guy I ‘hit’ was on ‘e’ tablets. Police eventually arrived and because I was in a ‘flash’ sports car they presumed I was speeding and started measuring skid marks, etc. Anyone it got resolved with me having to ‘override’ the insurance taking it to court to prove my ‘innocence’.

 

[306maxi]

Thing is that in the summer I'm on summer rubber and in the winter I'm on winter rubber. I've had a few people pull out in front of me in the winter when it's been cold and damp and on winter tyres the car pulls up really well, from the few months I was driving my 500 in the winter on summer tyres I'm not 100% sure it would have pulled up in time.

I only really bought the 16" wheels which of course come with the wider tyres because they look better. The cornering grip is fun, but the car becomes less easy to drive because wider tyres are less progressive when losing grip which isn't fun. Plus it's next to useless when it snows and the roads are slushy and don't even mention ice.

I'm kinda hoping that this winter has another really cold snowy snap so a few more people are convinced about winter tyres We shall see!

 

[Maisie]

Trip from Cheshire to mid-France and back, with a side trip to the West coast of France. Total mileage nearly 1,300, average mpg 58.1, including a good few hours of 75-80mph on the French motorway trying to get somewhere in a hurry with just 50.4mpg for that bit. I'm impressed!

 

[rkt2003]

I'm impressed!

Bloody good engine the m-jet,for performance on motorways ,plus the added bonus of economy imho

 

[pearce_jj]

215 mile round trip today, most motorway controlled 50 zones with a fair bit of rush-hour crawling, average was 75mpg - with a full DPF regen. I reckon the regen uses about half a litre of derv, so without that it would probably be about 77mpg.

I wonder if anyone has recorded numbers near (or better) in a twin-air. Actually I'd quite like to have a drive in one to see for myself.

 

[jrkitching]

215 mile round trip today, most motorway controlled 50 zones with a fair bit of rush-hour crawling, average was 75mpg - with a full DPF regen. I reckon the regen uses about half a litre of derv, so without that it would probably be about 77mpg.

I wonder if anyone has recorded numbers near (or better) in a twin-air. Actually I'd quite like to have a drive in one to see for myself.

Coming back from the Lake District last Sunday, I could only manage 69.8mpg over 240 miles, (albeit with the lights on & into a slight headwind).

I'd love to put my 1.2 head-to-head against a TwinAir, both driven for maximum economy - I really wouldn't want to bet on the outcome. But I'd say your diesel would beat me by about 3-5mpg.

 

[306maxi]

Coming back from the Lake District last Sunday, I could only manage 69.8mpg over 240 miles, (albeit with the lights on & into a slight headwind).

I'd love to put my 1.2 head-to-head against a TwinAir, both driven for maximum economy - I really wouldn't want to bet on the outcome. But I'd say your diesel would beat me by about 3-5mpg.

Oh to have skinny tyres!

You know that at 69mpg you could go 640 miles on a tank of go juice for the 500. I'm very happy to not be driving 80 miles a day (down to 7 or so each way), but I'm struggling to keep the indicated consumption at 50mpg whereas I was doing ~60 on my longer commute. Trips to the petrol station are becoming a rarity too, not filled up for almost 4 weeks now!

 

[jrkitching]

Oh to have skinny tyres!

I guess it's a sign of the times that my 175's should be thought of as 'skinny'. Not so long ago, 135's would have been considered adequate for a car of this size - and you wouldn't really need power steering with 135's, which would save a little more fuel.

but I'm struggling to keep the indicated consumption at 50mpg whereas I was doing ~60 on my longer commute. Trips to the petrol station are becoming a rarity too, not filled up for almost 4 weeks now!

Short journeys really hammer economy on the 1.2. My round trip to the supermarket is about 10 miles, and I can't do better than 55mpg on that journey from a cold start.

 

[pearce_jj]

That is one area the MJ does do well at, this time of year I find it's showing 55mpg by the end of the road from a cold start, which is about half a mile at 30mph.

 

[306maxi]

I guess it's a sign of the times that my 175's should be thought of as 'skinny'. Not so long ago, 135's would have been considered adequate for a car of this size - and you wouldn't really need power steering with 135's, which would save a little more fuel.

It is. The example I always give is our Subaru which at the time would have been a fairly high performance car. 0-60 in 6.5 seconds and it does 140 ish mph. It weighs about 1350kg's which is 500 more than a 1.2 and it only has 205's and my 500 which is 860kg's, only has 69bhp and can't even crack a ton has 195's on it. I mean I love the extra grip and all, but compared to the winter tyres it feels like you're driving with an airbrake on.....