Real mpg’s
06 May 2018, 05:15 AM
#1
Real mpg’s
I was talking with a friend who works with leasing cars and he was saying that manufactures will have to start showing real mpg rather then lab results.
anyone else hear this?
cab only be a good thing as my Honda says 36 yet I get 22.
anyone else hear this?
cab only be a good thing as my Honda says 36 yet I get 22.
06 May 2018, 09:49 AM
#4
They need to hammer the hybrids on this; Loads of people moan about the real world Mitsubushi's Outlander PHEV. The use of this tech massively skews MPG figures which only represent a 30minute commute.
Fact of the matter though is you can apply a lot of common sense here: If you have a car that is shaped like a brick and is tall (SUV, 4x4 etc), that weighs over 1500+kg and has huge wheels, it will need a increased amount of horsepower for it to maintain a set velocity. It will also require more torque to accelerate.
Fact of the matter is regardless of the powertrains, modern cars are far bigger, taller and drag along a extremely heavy chassis with a drivetrain that has a fair amount of complexity and parasitic losses (i.e using a alternator to generate power to drive a electric motor is less efficient than using a belt to directly drive it - if a solenoid/clutch system was used to engage/disengage or vary loading- cooling fans, power steering, water pumps etc. would be better driven via belt...we've gone backwards in a big way here). The end result is a modern engine no matter how efficient needs to produce more motive energy to accelerate and maintain a set velocity.
Fact of the matter though is you can apply a lot of common sense here: If you have a car that is shaped like a brick and is tall (SUV, 4x4 etc), that weighs over 1500+kg and has huge wheels, it will need a increased amount of horsepower for it to maintain a set velocity. It will also require more torque to accelerate.
Fact of the matter is regardless of the powertrains, modern cars are far bigger, taller and drag along a extremely heavy chassis with a drivetrain that has a fair amount of complexity and parasitic losses (i.e using a alternator to generate power to drive a electric motor is less efficient than using a belt to directly drive it - if a solenoid/clutch system was used to engage/disengage or vary loading- cooling fans, power steering, water pumps etc. would be better driven via belt...we've gone backwards in a big way here). The end result is a modern engine no matter how efficient needs to produce more motive energy to accelerate and maintain a set velocity.
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06 May 2018, 04:07 PM
#8
It quite easy to gauge mpg of ICE engines, just look at the worse number they quote, which is usually city driving. That is the mpg you will get.
Hybrids are just silly with their quotes. my XC90 hybrid does about 38-40mpg on a long journey. It does >100mpg when your journey is less than 25 miles. Fortunately for me that is about the maximum I have to do, so use all electric for all but a small portion of the journey.
Hybrids should have emissions test like any other ice vehicle.
Hybrids are just silly with their quotes. my XC90 hybrid does about 38-40mpg on a long journey. It does >100mpg when your journey is less than 25 miles. Fortunately for me that is about the maximum I have to do, so use all electric for all but a small portion of the journey.
Hybrids should have emissions test like any other ice vehicle.
Last edited by andy97; 06 May 2018 at 06:26 PM.
08 May 2018, 10:32 AM
#17
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At the end of the day their are so many variables that can effect fuel consumption that these figures really are only vague indications at best.
08 May 2018, 11:34 AM
#18
There's nothing wrong with quoting laboratory figures, as long as you make it explicitly clear that that's what you're quoting and that real world results may vary.
At the end of the day their are so many variables that can effect fuel consumption that these figures really are only vague indications at best.
At the end of the day their are so many variables that can effect fuel consumption that these figures really are only vague indications at best.
08 May 2018, 01:26 PM
#19
I use https://www.honestjohn.co.uk/realmpg/ as a guide to what cars get.
My wife's 5008 has over it's life achieved 47.4mpg. Official figures are 53.3 Honest John owners average 48.2
Definitely worth checking what other owners get rather believing what manufacturers say.
My wife's 5008 has over it's life achieved 47.4mpg. Official figures are 53.3 Honest John owners average 48.2
Definitely worth checking what other owners get rather believing what manufacturers say.
08 May 2018, 03:21 PM
#20
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I use https://www.honestjohn.co.uk/realmpg/ as a guide to what cars get.
My wife's 5008 has over it's life achieved 47.4mpg. Official figures are 53.3 Honest John owners average 48.2
Definitely worth checking what other owners get rather believing what manufacturers say.
My wife's 5008 has over it's life achieved 47.4mpg. Official figures are 53.3 Honest John owners average 48.2
Definitely worth checking what other owners get rather believing what manufacturers say.
The pistonheads real world MPG wiki is quite good to. That and (assuming they've reviewed the car you're after) the autocar magazine reviews, they do quite a sensible real world MPG test which is a reasonable indication.
. Road tax exempt and very friendly on the BIK tax
08 May 2018, 07:19 PM
#22
I specifically pointed that one out as I steered a friend away from having one because it is attcrocious for high-mile drivers: He does over 50,000 miles a year, so the Mitsi PHEV would have been terrible for this kind of use.
Of course, unless you live/commute in and out of London's congestion charge zones on a daily basis where it is exempt (once you pay the £10 'admin' fee to register it).
He didn't, so ended up with a Skoda Superb TDi (2017 model, so post Nox scandle )...He's chuffed to bits with it.
Last edited by ALi-B; 08 May 2018 at 07:21 PM.
11 May 2018, 11:04 PM
#27
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30 mpg on a run
9 -19 round town
3.0 H6
Never ever believed sales figures on mileage,
Or any other sales crap for that matter
I bought the car, i live with the MPG
Scared the **** out of me when i drove it back, the way it could make the
needle drop on the gauge
I was convinced it was going to clear a tank in 100 miles
Now i know i can get 300 miles on a tank its not too bad
9 -19 round town
3.0 H6
Never ever believed sales figures on mileage,
Or any other sales crap for that matter
I bought the car, i live with the MPG
Scared the **** out of me when i drove it back, the way it could make the
needle drop on the gauge
I was convinced it was going to clear a tank in 100 miles
Now i know i can get 300 miles on a tank its not too bad
12 May 2018, 06:50 AM
#28
Scooby Regular
you can moan about fuel consumption all day , but its all dependant on your right foo
Ran out of fuel yesterday close to Aachen tipped in 5 liter then filled up 57 liter on Aral 102 at Eschweiler and drove home just past Frankfurt. Distance travelled 263km that's 164miles, but had to coast into my driveway on fumes only.
164mile /13,2 gallons = 12,4 mpg but having fun for 1 hour 28 mins.
Equally the drive from Farnborough to Aachen at Constant 120 kmh was 348 miles even if I calculate a full tank is 26.4 Mpg
But was actually only 3/4 full when I left so more probably like 35 mpg
So if you want to drive fast its going to cost 3 times as much,
accept it as being a Scooby owner you must.
By the way
Yellow light gave just 12 miles at a constant 120kmh in Belguim.
164mile /13,2 gallons = 12,4 mpg but having fun for 1 hour 28 mins.
Equally the drive from Farnborough to Aachen at Constant 120 kmh was 348 miles even if I calculate a full tank is 26.4 Mpg
But was actually only 3/4 full when I left so more probably like 35 mpg
So if you want to drive fast its going to cost 3 times as much,
accept it as being a Scooby owner you must.
By the way
Yellow light gave just 12 miles at a constant 120kmh in Belguim.
12 May 2018, 07:56 AM
#29
30 mpg on a run
9 -19 round town
3.0 H6
Never ever believed sales figures on mileage,
Or any other sales crap for that matter
I bought the car, i live with the MPG
Scared the **** out of me when i drove it back, the way it could make the
needle drop on the gauge
I was convinced it was going to clear a tank in 100 miles
Now i know i can get 300 miles on a tank its not too bad
9 -19 round town
3.0 H6
Never ever believed sales figures on mileage,
Or any other sales crap for that matter
I bought the car, i live with the MPG
Scared the **** out of me when i drove it back, the way it could make the
needle drop on the gauge
I was convinced it was going to clear a tank in 100 miles
Now i know i can get 300 miles on a tank its not too bad
How many threads did we have on Scoobynet moaning about low 20s MPG on Turbo'd Imprezas?
Admittedly it is quite poo when I swapped mine for a Monaro VXR, which was better on fuel despite being bigger/heavier/more powerful etc. 
The VW R32 buyers were just as bad, in fact I point the figure at consumer pandering to the main reasoning for it being replaced with 'yet another 2.0 4cylinder'
When we needed good MPG and lowish tax we bought a diesel...admittedly, it's 2000kg with two turbos and 290Bhp/440lbft. But it happily potters around averaging 40mpg on most runs.
12 May 2018, 06:22 PM
#30
astra sri sports tourer 17 plate
16v 1.6 turbo petrol 212bhp in sports mode 290 miles devon countrysidedriving managed to average 51.3 mpg with average speed of 41.2mph
now slow down around town in traffic etc average speed of 24.7 only managed 46.3 mpg over roughly the same amount of miles
16v 1.6 turbo petrol 212bhp in sports mode 290 miles devon countrysidedriving managed to average 51.3 mpg with average speed of 41.2mph
now slow down around town in traffic etc average speed of 24.7 only managed 46.3 mpg over roughly the same amount of miles