Manufacturer mpg Vs Reality

pompeyrich

property.advert wrote: »

Make Vauxhall
Model Astra
Engine size 1.8 VVTi (140) auto
Fuel petrol
Year/Reg 2007
Manufacturer Combined no idea
My actual results circa 30mpg

Almost all 4 x 3 mile daily journeys through town on the school run with an occasional 10 to 20 mile trip and return. Not impressive but I was not expecting 50 mpg or any such nonsense. In fact, I don't think I'd get any motor to do much over 40 mpg in an auto and an oil burner with DPF would be a joke.

Good to see a realist, these mpg threads always end up with ridculous claims of 50-60-70mpg.

Gloomendoom

property.advert wrote: »

Make Vauxhall
Model Astra
Engine size 1.8 VVTi (140) auto
Fuel petrol
Year/Reg 2007
Manufacturer Combined no idea
My actual results circa 30mpg

Almost all 4 x 3 mile daily journeys through town on the school run with an occasional 10 to 20 mile trip and return. Not impressive but I was not expecting 50 mpg or any such nonsense. In fact, I don't think I'd get any motor to do much over 40 mpg in an auto and an oil burner with DPF would be a joke.

Why all the DPF hating?

My car has one and I love it. A virtually odourless exhaust and no smoke.

bigjl

Gloomendoom wrote: »

Why all the DPF hating?

My car has one and I love it. A virtually odourless exhaust and no smoke.

Why?

Well, the LAS has had over 350 DPF equipped cars and the exhaust stinks when in regen, exhaust pipe and exhaust gases get ectremely hot when on a regen, they break down all the time, engine management lights come on all the time, they go into limp mode all the time, due to the DPF regen cycle meaning that the engine management simply puts on extra diesel to increase the temp in the DPF to get rid of the soot etc, this extra diesel has a habit of ending up in the sump and the engine going bang as a result, at a minimum it will exhibit increased wear, especially the top end and the turbo.

I assume from your statement that you may have a PSA group car where the DPF is cleaned with Eloys Fluid?


On the subject of MPG,

Mondeo MK3 130 tdci

Manufacturers mpg, 47-48mpg

Over more than 2 years I have rarely gone under 50 mpg, easy 60 mpg on a long run at 65/75mph.


Zafria CDTi 120 Auto

Not sure on manufacturers figures, think they where around 44mpg.

Obtained on one car where you couldn't reset the fuel computer so the figure was from new over 3 years 17.1mpg, OUCH!!!

oldagetraveller

Make : Toyota
Model : Yaris
Engine : 1.4
Transmission : MMT (6)
Fuel : Diesel
Year : 2010
Maker's combined figure : 67.26 mpg
My average : 65.7 mpg ( calculated using actual fuel used, not trip computer, full tank to full tank).

inked

Make: Ford
Model: Mk7 Fiesta
Engine: 1.6 TDCi (89)
Fuel: Diesel
Year/Reg: 2009
Current Mileage: 33,500
Manufacturer combined: 67MPG
My actual: Average across 2 years of ownership is 48.8mpg, best is 56.3 from a full tank, worst is 40.47mpg again from a full tank.

Flyboy152

Wig wrote: »

I'd like people to say what Make, Model, Engine size, Fuel , Year or Reg they have what their book claims for combined mpg and what they actually get, If you feel up to it put in Urban and Extra Urban aswell. To convert l/100km into mpg use 282/L where L = no. of litres per 100km

Use this Template to reply with.......... Thanks for your results.

Make
Model
Engine size
Fuel
Year/Reg
Manufacturer Combined mpg
My actual results.........mpg

I'll start:

Make Vauxhall
Model Corsa
Engine size 1.2
Fuel Petrol
Year/Reg 2003
Manufacturer Combined mpg 44.7
My actual results.........mpg 40

Make Vauxhall
Model Corsa
Engine size 1.2
Fuel LPG
Year/Reg 2003
Manufacturer Combined mpg 32.8
My actual results.........mpg 32.5

Sorry, but this really is a pointless task. Every single driver, journey, car, fuel, weight, weather condition is different. There is no way to get an accurate, or even average, fuel consumption figure from randomly posting on the internet. The only real guide is a controlled test, where everything is exactly the same.

Flyboy152

zen.works wrote: »

yes there's one out there.

Honda insight manufacturer mpg 64 - Real life reported mpg 58 to 60

What was the journey, what speed was the driver doing, what was the weather like, how much uphill and downhill was there? What were the tyres like, were they correctly inflated, were they brand new or worn? What fuel was used, city or ULSD? How heavy was the driver, what was in the boot, did it have a roof rack on? Was it an estate, hatch, or saloon? How long did he drive at thirty, forty, fifty miles per hour and over what distance?

The point I am making (just in case you didn't realise ), is that it is impossible to compare the two cars, by simply saying that one driver achieved one level of fuel consumption in their car and another achieved something else in a different car.

Gloomendoom

bigjl wrote: »

Why?

Well, the LAS has had over 350 DPF equipped cars and the exhaust stinks when in regen, exhaust pipe and exhaust gases get ectremely hot when on a regen, they break down all the time, engine management lights come on all the time, they go into limp mode all the time, due to the DPF regen cycle meaning that the engine management simply puts on extra diesel to increase the temp in the DPF to get rid of the soot etc, this extra diesel has a habit of ending up in the sump and the engine going bang as a result, at a minimum it will exhibit increased wear, especially the top end and the turbo.

I assume from your statement that you may have a PSA group car where the DPF is cleaned with Eloys Fluid?

No, I don't. I have a Chrysler. The model has been around for five years without any DPF related problems that I am aware of.

Wig

Thanks everyone who isn't a defeatist, I am very pleased with the responses so far and hope that many more can come to the party

Flyboy152

Wig wrote: »

Thanks everyone who isn't a defeatist, I am very pleased with the responses so far and hope that many more can come to the party

But what are you trying to achieve? Whatever data you get will be useless and a complete waste of time.