Enzolor

Ok, I know it's not exactly rocket science, but anyone know the exact formula for converting Km/L to MPG?

My fuel consumption numbers don't seem right.

Thanks in advance.

Rotary Titus

I think everyone's getting mostly about 400kms per tank mix of city and highway.
I'm too lazy to look up conversions but:
(convert kms distance covered to miles) divided by (convert litres used to US gallons) and you get MPG

Enzolor

Thanks RT.. I know how to convert, just don't know if my units of measure are correct.

I'm getting about 330km per 50L fillup. Not exactly the best mileage, but I still have hopes in that the car is still being broken-in. That's in the neighborhood of 15 MPG if I'm not mistaken by my numbers...

Anyone else?

93rdcurrent

Seems to be a good average. I get aprox. 15-16 mpg in the city and about 20 mpg hwy. I will be getting the "M" flash here this week so it should be looking good from there.

Smoker

Simple:

L/100km = (234.7) / (MPG)

MPG = (234.7) / (L/100km )

Zedcaster

For the record 1 miles per gallon = 0.425143706 kilometers per litre. go to Google and type in "X kilometers per liter in miles per gallon"

I'm getting no more than 350 KM's per tank. I live 35 km's out of town on the highway so it's a good mix of city and highway driving. As of Sunday a fillup of 94 Octane is costing me $55 @1.009 per litre. It costs me $10/day for gas to and from work.

To quote ST:TNG "Darmak - his eyes open" I knew what I was getting into with a rotary, although my 1st Gen RX-7 got 22 MPG.

Smoker

here's a little more detail on the formula:


quote:
--------------------------------------------------------------------------------

I'll try this one.

If you use x liters every 100 kM, your mpg is 234.7 divided by x.

This is how I calculated this number. Let's say your car uses 12 liters
every 100 kM. A liter is 33.814 ounces, and a gallon is 128 ounces, so 12
liters = 12 * 33.814 ounces = 405.77 ounces = 405.77 / 128 gallons = 3.17
gallons. A kilometer is .62 mile, so 100 kilometers = 62 miles. Thus, if
you get 12 liters every 100 kM, your mileage is 62 miles per 3.17 gallons,
or 19.56 miles per gallon.

To summarize the conversion, if you use x liters every 100 kM, your mpg is
234.7 divided by x. (This number 234.7 comes from the above logic because
it equals 62 * 128 / 33.814).

HTH

Ken Sax
nsxtasy@mcs.com
Windy City Chapter BMWCCA

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8zoom

Ever thought about how stupid L/100km is? Wouldn't km/L be a bit easier to understand?

Smoker

Well, I disagree.

When are people interested in Fuel Consumption anyway ? Almost all of the time, they are interested in estimate the cost to travel X Km.

L/100 gives you a number in which you can easily calculate how much a certain trip is going to to cost. Just multiply this L/100 value with the current price of Gasoline and and the number of the Km (in units of 100kms) and that's it.

Works for me.

f1michel

Try this web site quys,

http://www.roity.com/petrol/metcalc.html

8zoom

Never thought of it that way, although I must admit I've never worried about how much a particular trip was going to cost, if I did I sure wouldn't have bought an 8. It just seems counter-intuitive to have a figure that behaves opposite to the commonly quoted mpg figure. The worse your mileage, the higher the L/100km....

Gord96BRG

Those are American Gallons!!!

You're supposed to be using the REAL Gallons, Imperial gallons, not those puny, weak, inadequate American Gallons!

The ACTUAL conversion factor for real gallons is 282.3, not 234.7.

Regards,
Gordon

Enzolor

THIS is exactly why I am confused with units of measure.

We are N. American customers, so I presume the MPG is measured in US gallons, and liquid (not dry?) for that matter!?

Gord96BRG

North America has three distinct countries - and Canada NEVER used the US liquid measures. Before we went metric, we used Imperial measures - for example, a Imp gallon is 4.546 litres, while a puny US gallon is only 3.785 litres. Even now, while manufacturers report Canadian mileage estimates in L/100km, if they show a conversion to MPG in Canada they will be referring to Imperial gallons. If you read one of the UK car magazines, when they talk MPG - they're certainly talking Imperial gallons.

Regards,
Gordon

8zoom

So when our American friends complain about only getting 21 mpg, we're actually getting 25 (point 222 to be exact) mpg. Sounds a bit better.

Smoker

hahhaha, right right. I left that out, that 234.7 is for American Gallons, not REAL gallons. :D

Enzolor

Man I'm lost. It's been years since I tried any math beyond addition/subtraction!

Can someone figure out what the US Equivalent MPG of 330km/50L fillup is? I'm guessing 15 MPG.

I just want to see where it sits with our fellow american complainers.

Gord96BRG

50L for 330 km is 15.15 L/100km. Using the US conversion factor of 234.7, the US mpg = 234.7/15.15 = 15.5 US mpg. (= 18.6 Imp mpg)

Regards,
Gordon

8zoom

330 km/50L equals 6.6 km/L (that's a scary figure, I suspect this is why the auto industry prefers L/100km)

6.6km/L times 0.62 miles/km equals 4.092 miles/L

4.092 miles/L times 3.785 L/US gallon equals 15.5 mpg (US gallons)

4.092 miles/L times 4.546 L/imperial gallon equals 18.6 mpg (our gallons)

pauleta

You can convert anything in the google search
Just type
15.15 l/100km to mpg
in the google search bar

15.15 L/100km = 15.5257151 miles per gallon

or 15.15 mpg to l/100km

15.15 miles per gallon = 15.5257151 l/100km

MyRxBad

iTrader: (1)

I made up a Microsoft Excel Spreadsheet to calc:

L/100km
MPG(US)
MPG(Europe)

If you want I can send you a blank copy with the formula's in place. All you have to fill in is the KM's and litres of gas put in.

Lemme know.

storemannormin

Hey Guys screw fuel consumption what about the oil consumption
I used 3 litres to my 3900 klm...that is crap

Enzolor

Uhm that's crazy.. I just topped 1100km and the dipstick is still 3/4.

Regardless, oil is cheap.

dannobre

iTrader: (3)

Used to be that oil was expensive, and gas cheap. Don't get it.....gas has gone through the roof and oil seems like a bargain now.

Enzolor

Well, at Lordco today, I picked up 4 bottles Castro GTX (1 litre each) of 5W20... bill came out to $12+change.

Considering it only takes 1 litre to bring the oil level from low to full on the dipstick, it's cheap!