i30 SR 2.0L Petrol

Average - 7.8l/100km (36.2 mpg)
Best - 7.0l/100km (40.4 mpg).

Most of my driving is on the freeways.

Tim.

Hi There,

I zero'd my average fuel consumption about 100kms ago and made a concerted effort to drive carefully (about 80% of the 100kms on the highway driving at between 80 & 100kph but keeping up with the traffic - there's a bit of roadworks around)

Has been hovering between 4.9 & 5.0 lts per 100kms (see pix - done with phone) got to be happy with that although think going forward I'll want to give her a bit more (will probably creep back up to between 5.2 & 5.4 - but that's ok.

Cheers,

Dazz

I've been monitoring fuel use and I calculate 36 mile per gallon, mainly urban driving.
(Can anyone convert this to litres per 100 kilometers so I can compare?)

YET the average fuel consumption on the trip computer has been between 49 to 54 miles per gallon.

Anyone else had sure a wide variance??

here you go

http://www.pege.org/fuel/convert.htm

Thanks I30 Dave

Works out at 6.55333 litres per 100k

How does this compare?

Hi I30 Dave,

How accurate is the converter?

I been on the Hyundai UK site and they give different figures to those I got when using the converter.

Is there a different formula depending where you live or am I being short changed.

CRDi - Common Rail Diesel injection for 1.6cc Hyundai give the following:

Urban 5.7 l/100k (49.6)
Extra Urban 4.1 l/100k (68.9)
Combined 4.7 l/100k (60.1)

Converter using MPG 4.7 (49.6), 3.4 (68.9), 3.9 (60.1)

Does anyone have a formula?

Dave,

I spotted a problem to. I think the converter is based on the US gallon, which is not the same as the UK and old Aussie gallon.

If you look at the site, it says "The used formula is: mpg = 235.214584 / DIN".

I've previously calculated that to be 282.45. In other words, to get litres per100k divide 282.45 by the mpg. To get mpg, divide 282.45 by l/100k.

Bob

Dave, all i do to convert lites to imperial gallons is, div Lt's by 4.5 to get gal, or multiply gal by 4.5 to get L, the US gal is about 3.7 or 3.8, i have been riding Harley Davidsons since i was young, and the 5 gal US tank only holds about 19 or 20 L, or 4 imperial gal.

you have to remember Dave if you are in a lot of stop start driving you are not always moving so half your fuel usage would need to be calculated in an hourly rate, and half in a distance rate. so would be more accurate just working out how much fuel you use per hour, then working out how much time you spend with motor running.
can also be your driving style, if you brake hard you use fuel, if you shift at a different rev you can use a dif amount of fuel to someone that shift's at a different rev . there are lots of reasons including weather conditions. weather conditions can also mean your motor can make different horsepower and different torque, just because of the quality of the air it has to use on the day. even your weight can make a difference or if your tank is full or low, there always has to be a reason m8.

This post has been edited by Lakes: May 4 2008, 02:34 PM

Lakes, that's nearly right and good enough for estimates.

I don't want to split hairs but I am going to (because I have a maths background) and it is Sunday morning and my wife is off with the i30 for the day and I'm lonely. (I think that is defencible if my wife reads this.)

To be precise, 1 litre = 0.22 gallon or 1 gallon = 4.54 litres.
That's 2.12 litres in a tank of fuel difference. Not a great difference, but it is silghtly out.

Similarly, most people use 50 miles = 80 km, but to be precise, its 80.46 km. That is 1km = 0.6214 mile or 1 mile = 1.609 km.
That difference means 6.3 km out in 700 miles (for Shambles)

There is a good conversion calculator on a UK site at http://www.initium.demon.co.uk/converts/metimp.htm#Liquid

It covers most measurements, including US to metric.

Have a good day guys. I'm off to golf in the Getz later. Have fun.

Bob

Right!!

Just got back after my 350 round trip I mentioned.

Anyway I'm going to brag now.

350 miles Used 5.5 gallons of diesel = 63 5 mile to the gallon.

If anyone can work it out please post l/100k as I'm confused over different ways you can work it depending where in the world you live.

1.6 crdi, 4 adults, full boot cases etc

Can anyone beat this?

Shambles - M53, M56, M62, M1, A1 kept to UK natonal speed limits on all roads!!! As if.

Aye aye.

Them's the best figures I've seen, but on those roads I'm not too surprised. Bit better than the 30mpg you reported earlier :)

These adults you were carrying, they aren't by any chance flyweight boxers are they :P

Did you ever see Fool and Horses and Del Boys and Rodders "friends" that inflated in the back of the Robin Reliant.

Hey Bob, no worries m8 just useing the kiss system :thumbsup:

hey eye30 that is close enough to 4.41 L/per 100K mate thats great mate how did you work it out?
i still have dealer fitted fuel so don't know what i'm getting but have traveled close to 400k mostly city but gauge reads around 3/4 full, but i never really trust fuel gauges, i'll wait till the light comes on and go 50 k more then fill up.

Hey Shambles and eye30, are you boys sure you don't use metric measurments? i'm just wondering why you measure you engine size in cc not cubic inch? also as Bob is a mathematician i've always wondered why if we went to metric measurement and everyone knows with metric everything is 10's or 100's why we still have 12 months in our year and why we still have 12 or 24 hour in our clocks? we could change to a ten month year and a 10 hour clock? :)
Cheers Lakes

This post has been edited by Lakes: May 4 2008, 02:57 PM

It's been done mate..

French Revolutionary Time

Managed to get roughly 5.5L/100KM on the weekend driving to Sydney. It was my first full tank of fuel as well :) The dealer only gave me half a tank.

I was quite surprised as I was going hard on some parts..

Did 570km's and filled up roughly 31 Litres and I reckon I had another close to 400km left in it

Ya,

That metric time would have been a good idea. The French should have pushed it a bit more. The metric measurement system started in France. The only real issue with time is the 12 month thing. Got something to do with cycles of the moon.

Anyway, back to the metric to imperial measures and fuel consumption, as I have said before (elsewhere I think), just remember 282.45.

So, to convert the 63.5 mpg, it is 282.45/63.5 = 4.448 l/100k

Then, to convert back, it is 282.45/4.448 = 63.5 mpg

Either way, it works.

Just to clear things up, I am not strictly a mathematicin, I am a teacher with a background in mathematics, science, IT and librarianship. Strange mix, but that is me - strange mix.

Bob

Bob