Thread: fuel economy

Originally Posted by Tonto

Ive got the distance travelled and the fuel used but how do I calculate these together to get the KPL

Kpl = km/litres used

500km travelled/50 litres used = 10kpl

Oh for the days of MPG where achieving 40MPG was lifes aim.
I knew a fellow who's GTS Falcon got 38 MPG one long runs and 28MPG on city

I normally go;

500km divided by 40 litres equals 12.5 km for each litre. 12.5kppl.

Then I go 100 divided by 12.5 equals 8 litres per 100km.

OK so I travelled 1450 K used 157 bio desiel = 9.24 kpl
* 100 divided by 9.24 = 10.82 correct?

Originally Posted by Tonto

OK so I travelled 1450 K used 157 bio desiel = 9.24 kpl
* 100 divided by 9.24 = 10.82 correct?

Yep. Another way to look at it is, you travelled 14.5 "blocks" of 100km's so you can divide you fuel into 14.5 bits to get how much went into each 100km block. 157/14.5=10.8

An XR8 falcon needs about 13l to go 100km but there's a little spot on the dash that tells you that.

Originally Posted by Dan

Yep. Another way to look at it is, you travelled 14.5 "blocks" of 100km's so you can divide you fuel into 14.5 bits to get how much went into each 100km block. 157/14.5=10.8

An XR8 falcon needs about 13l to go 100km but there's a little spot on the dash that tells you that.

So your using about 28 MPG old scale

the other way to do it is download Microsofts Calulator Plus which is a great addon does many conversions http://www.microsoft.com/downloads/d...DisplayLang=en

Google calculator does scientific and conversions

No programs to download:
http://www.google.com.au/intl/en/hel...tml#calculator
http://www.google.com.au/intl/en/help/calculator.html

Originally Posted by wheelinround

So your using about 28 MPG old scale

I reckon about 18mpg for me and about 22mpg for Tonto (could be wrong though).

fair go is that good the little navara 4cyl ute was going like a bat outa hell. Ave speed to Adelaide 135. kid you not. both UHF radios working the truck lines and all clear on the highway rubber ducky.Ave speed return trip 120 Bio desiel is great. When I was using standard desiel could barely reach 120k and fuel use was about 550k on a tank now we (read I) can hit 150ks and about 850-900k on a tank.
Poor little bugga its an '89 380klicks on the dial carries full bull bar and A frame tow hitch on the front as well. Back is Jarrah floorboards workings as dropside.

Say you put 60l in the car and it has done 600Km. 10 km/l.... Roughly, multiply by 3 and you get mpg (30).

It seems it's closer to multiply by 2.

10km/l is (according to google) is 23.5mpg.

Originally Posted by Dan

It seems it's closer to multiply by 2.

10km/l is (according to google) is 23.5mpg.

Nah. It's actually 28.xx. That 23.5 might be US measures. Here's a link

http://www.accommodationz.co.nz/economycalculator.html

From memorythe magic number is 282.
282/mpg = L per 100Km
282/L per 100Km = mpg.
Can't remember where I found it but I use it when travelling just because I can - and mpg still makes more sense to me than L/100Km, even though it is easier to work out the distance I can travel on a tank full when the tank capacity is measured in litres. Saves having to divide the number of litres by 4.54609 to get gallons.

Ernie.

Originally Posted by MurrayD99

Nah. It's actually 28.xx. That 23.5 might be US measures. Here's a link

http://www.accommodationz.co.nz/economycalculator.html

Bugger.

According to Wikipedia,

• U.S. liquid gallon is legally defined as 231 cubic inches, and is equal to 3.785411784 litres (exactly) or about 0.13368 cubic feet. This is the most common definition of a gallon. The U.S. fluid ounce is defined as 1/128 of a U.S. gallon.
• U.S. dry gallon is one-eighth of a U.S. Winchester bushel of 2150.42 cubic inches, thus 268.8025 cubic inches (exactly) or 4.40488377086 litres (exactly)
• Imperial (UK) gallon is legally defined as 4.54609 litres (~277.42 cu in), which is about 1.2 U.S. liquid gallons. This definition is used in the United Kingdom, and is based on the volume of 10 pounds of water at 62 °F. (A U.S. liquid gallon weighs about 8.33 pounds at the same temperature.) The Imperial fluid ounce is defined as 1/160 of an Imperial gallon. The Imperial gallon is no longer legal, in the UK, for trade or public administration purposes, but it is used colloquially (and in advertising) for fuel consumption figures in miles per gallon. The Imperial gallon continues to be used as a unit of measure for fuel in various countries (for example, United Arab Emirates and Sierra Leone).