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General Real world MPG

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General Real world MPG

With my previous 1.9 120HP multijet I could do from 1000-1050km per tank.
With 1.4 120HP t-jet which I drive now for one month I do from 850-900km. It all depends by the driving style, road conditions and tires. With the diesel, I could achieve 1000km without hassle but I really have to look at the rpm on the t-jet. I own it just a month and I am not suppose to go above 3500rpm and rev it cold as I bought it with a blown turbo and had it replaced. Also the previous driver NEVER!!! replaced the oil and filter from 0-73000km, that is the reason the turbo died and I got a good price from the dealer. I still have the diesel version but a cannot drive it since I am divorced and due to divorce I cannot drive it as the insurance was written on my spouse, who is not willing. So I bought a new one, as I really like the Bravo.
 
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The Fiat mechanic said that after changing the oil after 3000km they will remove the oil pan and clean it and replace the oil with filter again. Changing oil after just 3000km should help clean the engine of the residue, and afterwards after cca 5000km I should change it again, so the engine will be clean. Afterwards I can drive the car normally.

PS: I guess he was just a Douchebag!
 
I am amazed at the mpg values you guys get! I have yet to check the mpg by brimming the tank, but the on-board computer shows something in the region of 9 litres per 100km. That's roughly, oh, about 31 miles per gallon, on a 10 mile commute, about 70% motorway, twice a day. Can't be right! Are you guys seriously regularly getting in excess of 40 mpg from a 1.4T-jet?
 
bigmacinspain said:
I am amazed at the mpg values you guys get! I have yet to check the mpg by brimming the tank, but the on-board computer shows something in the region of 9 litres per 100km. That's roughly, oh, about 31 miles per gallon, on a 10 mile commute, about 70% motorway, twice a day. Can't be right! Are you guys seriously regularly getting in excess of 40 mpg from a 1.4T-jet?
Click to expand...

They're talking about the M-jet I believe. Diesel.
 
Most Easterly Pandas said:
Never liked that site, can be what ever anyone wants to put in, at least with Fuelly you can see the fill ups data yourself to work out if its genuine or not.
Click to expand...

The comments were centred on the 50.1 true figure submitted by Freebo & the 50.4 av.mpg indicated in the OH.

The HJ reference was added for further info - another issue is, I don't think it shows how many are running the model in question.

151710Z
 
Matthewr1990 said:
They're talking about the M-jet I believe. Diesel.
Click to expand...


We were talking about both the gasoline version tjet and the diesel version mjet. In my case I have both.The diesel version is now parked outside my house. I could never get the diesel version with 120HP to consume more than 5.5l per 100 even in the summer with 225/45/17 and I do a lot of highway and a lot of extraurban.I drive around 3300-3500km per month and with the diesel in summer it was 5.4 in extreme cases 5.5l in winter it was 4.8l on 195/65/15 on the highway I cruse between 110 and 140km/h. With the gasoline version the consumption climbed a bit higher now going from 205/55/16 to 225/45/17. Before it was 6.6 now I am getting 6.7l. I do not know about the winter consumption on tjet gasoline as I own it for a month.

I guess it depands of the gasoline, driving and acceleration, tyres and tyre pressure and road conditions.
 
Caravadossi said:
The HJ reference was added for further info - another issue is, I don't think it shows how many are running the model in question.

151710Z
Click to expand...

This explains the noticeably lower percentage against the 2.0 if fewer have submitted (I assume) compared to the more common 1.9. Not really accurate if you going to make a comparison.
 
I have no idea how you are all getting such high MPG. I've got a Punto Evo 1.4 and when I try, I can get 38mpg, otherwise when I'm driving normally ill get up to 34mpg.
How do you all do it?
 
Get easy on the accelerator and try to shift gears at the right moment, also do observe the traffic and try to predict it so you will use less breaks or you will need less aggressive acceleration. Learn driving while observing instant consumption as it will give you some indication where and where you are with gears and acceleration check the rpm. With time you will master it… It can be fun, just like a game.
 
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There are some interesting tips here:

http://www.moneysavingexpert.com/travel/car-check

The post above highlights the difference tyres and wheel sizes make. I've got 16" Goodyear EfficientGrip Performance on mine and I deliberately went for them as they are latest design, 'B' rated for efficiency and 'A' rated for wet grip (living in Scotland). I could have gone for A efficiently, but I would have sacrificed grip and the difference is negligable. Things like tyre pressures also make a huge difference.

From a phyiscs point of view- a smaller, lighter skinnier wheel will rotate faster so takes less effort to accelerate and start moving (ie great round town) but then takes more effort to keep it moving (ie not so good on motorways). With a larger wheel, assuming there isn't much resistance its own momentum will keep it turning almost. You don't see trucks with small wheels do you?

The obvious fuel users are stop / start, heavy revving and aircon. At speed aero dynamics becomes an issue as well as revs - hence why 50mph will use much less fuel than 70 - the further over, the more fuel you are going to need to use.

If I'm being very frugal, I will use as high a gear as possible all the time with as little change in speed as possible. I'll even use cruise control in light traffic on urban roads if it is flowing ok.

Think about roundabouts. You actually aren't meant to stop at them! Traffic lights if there is no traffic I'll simply coast up to them in the hope they are green when I reach them and therefore don't need to waste energy stopping etc.

www.iam.org is another great source of information (and well worth joining)
 
Fergie said:
... At speed aero dynamics becomes an issue as well as revs - hence why 50mph will use much less fuel than 70 - the further over, the more fuel you are going to need to use ...
Click to expand...

I invite anybody to trial this Fergie theory at the earliest opportunity …

On an M-way with blackbox set to [inst.mpg] …

(i) what reading do you get at a steady 50 mph?
(ii) what reading do you get at a steady 70 mph?

I find my best mpg level with a 1.9/16v150 is when doing around a true/indicated 70/75 at just above 2K revs.
Retarding to 50 wouldn’t return any improvement.

152126Z
 
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Obviously don't want the car labouring which can cause engine wear etc, but remember my 1.9 16v mjet doesn't have a dpf :D

Interesting you find it more efficient at 70mph - sounds like another test lol.

I would say mine is more efficient sitting about 1500rpm and the computer certainly shows a drop in mpg sitting in 6th at 70mph compared to 50mph.

Tbh the figure I tend to use is cost per mile. Obviously its fuel price dependant, but I've worked it out to vary between 10p and 17p depending on how I drove the car. It was definitely higher when the car was standard though!
 
Fergie said:
There are some interesting tips here:

http://www.moneysavingexpert.com/travel/car-check

The post above highlights the difference tyres and wheel sizes make. I've got 16" Goodyear EfficientGrip Performance on mine and I deliberately went for them as they are latest design, 'B' rated for efficiency and 'A' rated for wet grip (living in Scotland). I could have gone for A efficiently, but I would have sacrificed grip and the difference is negligable. Things like tyre pressures also make a huge difference.

From a phyiscs point of view- a smaller, lighter skinnier wheel will rotate faster so takes less effort to accelerate and start moving (ie great round town) but then takes more effort to keep it moving (ie not so good on motorways). With a larger wheel, assuming there isn't much resistance its own momentum will keep it turning almost. You don't see trucks with small wheels do you?

The obvious fuel users are stop / start, heavy revving and aircon. At speed aero dynamics becomes an issue as well as revs - hence why 50mph will use much less fuel than 70 - the further over, the more fuel you are going to need to use.

If I'm being very frugal, I will use as high a gear as possible all the time with as little change in speed as possible. I'll even use cruise control in light traffic on urban roads if it is flowing ok.

Think about roundabouts. You actually aren't meant to stop at them! Traffic lights if there is no traffic I'll simply coast up to them in the hope they are green when I reach them and therefore don't need to waste energy stopping etc.

www.iam.org is another great source of information (and well worth joining)
Click to expand...
hi fergie lots a good info given, except i think you are holding a slight misconception here with regards tyre sizes...'smaller lighter skinnier'..... whether a wheel is 15 or 16 or 17/18 inch there actual circumference will be the same near as dam for any given car with the option of different sized wheels, once the appropriate tyres has been fitted... as they work on a plus or minis of 1.5% radius. in fact normally a larger equivalent wheel/ tyre has a smaller radius to the standard so its not a smaller tyre with regards turning the wheel one full rotation [circumference]...and lorries don't have small wheels and small tyres because the cab would be sitting on the ground if they fitted smaller tyres as you say..... thinner tyres which i believe is what you meant have a smaller surface contact area on the ground so that means all things being equal it need less effort [fuel] to get it moving and keep it moving regardless of speed ie around town or m/way...indeed i do wonder do 15 or 16 inch wheels, fitted with tyres actually weigh less than 17 or 18 inch wheels with tyres? all things being equal...Also i know you didn't post this bit but pulling off slowly and accelerating slowly is not necessarily better than getting up to speed than slightly briskly acceleration for fuel consumption remember off throttle diesels use zero fuel if it takes you say 4 second of brisk against 10 seconds of slow, you could be off throttle for 6 seconds longer drifting and using no fuel, if you used twice as much fuel being brisk against slow you would still be quids in from drifting for 60% of the time somebody was accelerating slowly.......
 
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