Do you know your car's real world mpg or not?

cantdecide

Dealer numbers and Onboard Computer stats don't count!!

A friend of mine made the point that a lot of people that own 'green' cars and small 'economical runabouts' that were bought primarily with economy in mind usually have no idea what actual real world fuel consumption they make. A lot of the time people are buying these cars on the assumption of economy but the way they go on to use them blows the economy out the window and how they gauge fuel consumption (trips to the €20!!) gives no accurate indication.

dr.bollocko

A good way to gauge your MPG on an older car where you don't have an onboard computer is to do a neck-fill then reset your trip clock to 0.

Then next time you fill up do another neck fill (no recession around here), check how many gallons went in, how many miles on the trip calculator and do some magical mathematics involving fcuking dividing by zero or some crap and that's your mpg. Or litres per 100k if you're fcuking french or some crap I dunno.

Aglomerado

Toyotas have this onboard MPG gauge feature. It's accurate enough as I did the maths on a neck fill / mileage done on the odometer and it worked out roughly the same as the stats I got from the car.
Thanks to roadworks and closures I've had to travel back roads for the past month and am getting fcuck all bang for my buck. :mad:

4zn76tysfajdxp

dr.bollocko wrote: »

Or litres per 100k if you're fcuking french or some crap I dunno.

Royale with cheese.

dr.bollocko

Le Big Mac.

xLexie

Sorry wut

antodeco

Mpg? The stuff in food?

holystungun9

Do the neck fill thing, handcuff the local fitness nut to a door handle or some other fixed point on your vehicle. Make sure (s)he has their pedometer thingy with them and drive like fck. As mentioned above there may be some further calculations like dividing 0 by the root of co sin tan or whatever but if you round up, the figures should be pretty sound.

Please don't do this with animals.

cantdecide

antodeco wrote: »

Mpg? The stuff in food?

It's time to sell the Prius.

Scruffles

dr.bollocko wrote: »

A good way to gauge your MPG on an older car where you don't have an onboard computer is to do a neck-fill then reset your trip clock to 0.

Then next time you fill up do another neck fill (no recession around here), check how many gallons went in, how many miles on the trip calculator and do some magical mathematics involving fcuking dividing by zero or some crap and that's your mpg. Or litres per 100k if you're fcuking french or some crap I dunno.

cripes,cant afford to put more than the odd five pound [in euro; 5.84388 ?] in,twice a week to be exact,poor bugger has never seen a full engine before.

havent got a clue what it means but the average MPG on mine is 62.8,is that good or bad?
its a petrol driven citroen nemo multispace,am not a driver but own it under the uk motability scheme,one of the reasons had chose it was it makes better use of petrol instead of necking it back like some...petrolaholic.:P

Aglomerado

holystungun9 wrote: »

Do the neck fill thing, handcuff the local fitness nut to a door handle or some other fixed point on your vehicle. Make sure (s)he has their pedometer thingy with them and drive like fck. As mentioned above there may be some further calculations like dividing 0 by the root of co sin tan or whatever but if you round up, the figures should be pretty sound.

Please don't do this with animals.

Bonus miles per gallon if they are wearing bright yellow Lycra running gear.

cantdecide

cantdecide wrote: »

Dealer numbers and Onboard Computer stats don't count!!

They are quite accurate in my experience so not fair to discount them. I have checked my a few times by filling and then filling again and its almost exactly the same as the long term average readout from the on board computer. Mine is 9.1L/100km or 31mpg and the car is VW Golf GTI.

Kess73

xLexie wrote: »

Sorry wut

Pulp Fiction

dr.bollocko

Kess73 wrote: »

Pulp Fiction

I don't remember asking you a goddamned thing.jpg

JR Ewing

Very hard to work out an exact MPG when the fuel pump at the service station could be wrong? In 2010 - NSAI inspected 8,000 pumps and found approx 2,000 i.e. 25% of them to require alteration!!!!!

http://www.independent.ie/national-news/courts/dublin-service-station-fined-14k-for-fuel-overcharging-2927898.html

The World & it's mother focused & fixated on "the price" of fuel? Open your eyes people & spot what is really going on!!!!! Have a look at the artivle below fro USA & UK- does anyone think that this doesn't go on in Ireland? Not likely!! The Oil business is now rotten to the core- petrol being stretched with extra alcohol, diesel being washed, agri diesel being stretched with bio diesel & other oils, kerosene being stretched with bio diesel, and also clear parrafin from UK.........."new" suppliers springing up like mushrooms but people still only interested in "the price"? CAVEAT EMPTOR- let the buyer beware

http://www.nj.com/business/index.ssf/2013/01/investigators_find_broken_seal.html

http://www.bbc.co.uk/news/uk-northern-ireland-15482349

CruelCoin

Economy is secondary to me.

Car is a 2.0 litre diesel BMW 3 series. I blast around in it like my arse is on fire and still get an average 39.4 mpg

CruelCoin

cantdecide wrote: »

Dealer numbers and Onboard Computer stats don't count!!

That for one is crap.

Why do you discount a computer doing very simple maths? Miles travelled versus fuel used is not rocket science.

"real world mpg" is a bogus term.

cantdecide

CruelCoin wrote: »

That for one is crap.

Nice to meet you, too.

CruelCoin wrote: »

Why do you discount a computer doing very simple maths? Miles travelled versus fuel used is not rocket science.

How does your car calculate how many litres of fuel you have used? How scientific do you think your fuel level sender is?

I've had a bunch of cars that had OBCs and they've always been at odds to the neck-fill approach by between 5 and 15% IME. Always optimistic. Maybe it's gotten better with time but I've learned to never rely on them...

cantdecide

CruelCoin wrote: »

Economy is secondary to me. Car is a 2.0 litre diesel BMW 3 series. I blast around in it like my arse is on fire and still get an average 39.4 mpg

26 polled at this stage and only one quoted mpg figure...

I get a consistent 32-34 mpg from my 323F 2.0 Sport

dr.bollocko

cantdecide wrote: »

Nice to meet you, too.



How does your car calculate how many litres of fuel you have used? How scientific do you think your fuel level sender is?

I've had a bunch of cars that had OBCs and they've always been at odds to the neck-fill approach by between 5 and 15% IME. Always optimistic. Maybe it's gotten better with time but I've learned to never rely on them...

Truck manufacturers also over-estimate this figure.

BostonB

cantdecide wrote: »

Dealer numbers and Onboard Computer stats don't count!!

A friend of mine made the point that a lot of people that own 'green' cars and small 'economical runabouts' that were bought primarily with economy in mind usually have no idea what actual real world fuel consumption they make. A lot of the time people are buying these cars on the assumption of economy but the way they go on to use them blows the economy out the window and how they gauge fuel consumption (trips to the €20!!) gives no accurate indication.

What your point here. If they used less green cars and use them the same way would their fuel economy be better or worse? If worse, then their decision to buy a greener car is valid no?

By greener I assume you solely mean more fuel efficient. Not the cost in materials or batteries etc.

cantdecide

BostonB wrote: »

What your point here. If they used less green cars and use them the same way would their fuel economy be better or worse? If worse, then their decision to buy a greener car is valid no?

By greener I assume you solely mean more fuel efficient. Not the cost in materials or batteries etc.

The point is if that a lot of green or economical cars have to be driven within assumed parameters to achieve the anticipated fuel consumption and often those who choose these cars and the compromises that go with them are often saving little.

As regards the 'green-ness' of the car and the polluting it will do in it's life with regard to production and disposal of batteries etc is a whole other kettle of fish.

BostonB

Saving little compared to what alternative? Driving them economically or buying a different car?

What cars do you mean?

debabyjesus

Best I've ever got from a 1.4 2006 civic ep1 is 5.2 l/100km. That's fill drive fill divide method. That's driving as economically as possible. Trip computer showed 4.9

Usually its between 6 and 7 with normal driving. Going a bit slower on motorways keeps it right down.

After doing this for a while i then realised there were more important things to be worrying about.

Aglomerado

JR Ewing wrote: »

The Oil business is now rotten to the core

I like the fact that this posting was made by JR Ewing.

gobnaitolunacy

My car gets 40 rods to the hogshead and that's the way I likes it

cantdecide

So three quarters of yis can state the car's most accurate fuel consumption figure?

Mr Benevolent

cantdecide wrote: »

26 polled at this stage and only one quoted mpg figure...

I get a consistent 32-34 mpg from my 323F 2.0 Sport

35mpg with a 2002 Corsa C auto, aircon and rear window heat on. Both off for the next tank to compare.

ScumLord

cantdecide wrote: »

I've had a bunch of cars that had OBCs and they've always been at odds to the neck-fill approach by between 5 and 15% IME. Always optimistic. Maybe it's gotten better with time but I've learned to never rely on them...

I've found the trip computer on my car to be pretty dependable. Dependable enough for the average consumer anyway, if it says there's 100km in the tank I can trust I'll get that 100km out of it.

The main use of the trip I've found is to monitor economical driving. It just lets you know your saving fuel.

funk-you

Haven't got a clue. I do know it's fast as fuck, shiny and chicks dig it though. Aren't they the most important things to know about a car?

-Funk

--Kaiser--

Yes
35 mpg if I'm being good
25 mpg if I'm not
So about 30 mpg on average