Go Back   Team-BHP > Under the Hood > Technical Stuff


View Poll Results: Which method of FE calculation do you prefer?
KPL 69 84.15%
Liters / 100 kms 13 15.85%
Voters: 82. You may not vote on this poll

Reply
 
Thread Tools Search this Thread
Old 26th May 2011, 15:54   #16
GTO
Team-BHP Support
 
GTO's Avatar
 
Join Date: Feb 2004
Location: Bombay
Posts: 47,749
Thanked: 89,406 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

*Public Poll added*

Bah, I much prefer the kpl method. It's easier to understand and relate to, especially if you've grown up using kpl as a measure of FE. Some European cars I've driven display consumption in the L / 100 kms method by default on the MID. I promptly change it to kpl

And at the end of the day, both tell you the same thing. It's not like one makes the car more efficient.

Quote:
Originally Posted by libranof1987 View Post
say full tank at odo 30000 and the next full tank at 30060
Sorry, but I can't think of any car that uses up a tank in 60 kms. Plus, most Indian cars do at least 400 kms on a full tank, and we anyways recommend the full-tank-to-full-tank method of calculating FE.

Thus, the range is even broader than the 100 kms you are suggesting.

Last edited by GTO : 26th May 2011 at 15:56.
GTO is offline   Reply With Quote
Old 26th May 2011, 15:57   #17
Team-BHP Support
 
mobike008's Avatar
 
Join Date: Sep 2006
Location: Hyderabad
Posts: 10,746
Thanked: 7,964 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

Easiest method is to use KPL.

Litres/100kms is like taking a bite with your hand circled around your head.
mobike008 is offline   Reply With Quote
Old 26th May 2011, 16:01   #18
Distinguished - BHPian
 
volkman10's Avatar
 
Join Date: Dec 2010
Location: --
Posts: 10,062
Thanked: 15,601 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

It depends on the usage in a specific country and that method of measurement grows on you and the other types seem complicated.
For us kpl is the way to go.

Cheers!
volkman10 is offline   Reply With Quote
Old 26th May 2011, 16:08   #19
Senior - BHPian
 
srishiva's Avatar
 
Join Date: Nov 2006
Location: Bengaluru
Posts: 3,580
Thanked: 823 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

It depends on what you have grown up with. We always have been using kpl and its easy for us to compare.
srishiva is offline   Reply With Quote
Old 26th May 2011, 16:31   #20
Team-BHP Support
 
noopster's Avatar
 
Join Date: Feb 2010
Location: Pune
Posts: 8,665
Thanked: 9,197 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

Forgive me but this is silly. You DO realise that you're measuring exactly the same thing, right? Meaning if someone says 8 kmpl, doing the math to get 12.5 lit/100km or 1250 lit/10,000 km is just a quick step away. So what difference does it make?

It's all a question of conditioning and which metric system you are more familiar with: e.g. most of us in India talk about speed in km/hr but after watching enough Top Gear, am sure we know what the Brits/Americans mean when they say 0-60 in 8.5 seconds or Top Speed of 160! THe human brain is quite adaptable that way!

Having said ALL that, I prefer my MID to be calibrated in km/litre. Mostly because 100 km is not an identifiable distance for me: it's too much for a daily commute (in my case I mean) and too short for an intercity drive!
noopster is offline   Reply With Quote
Old 26th May 2011, 18:16   #21
Distinguished - BHPian
 
libranof1987's Avatar
 
Join Date: Sep 2010
Location: All over!
Posts: 3,740
Thanked: 2,868 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

Quote:
Originally Posted by GTO View Post
Sorry, but I can't think of any car that uses up a tank in 60 kms. Plus, most Indian cars do at least 400 kms on a full tank, and we anyways recommend the full-tank-to-full-tank method of calculating FE.

Thus, the range is even broader than the 100 kms you are suggesting.
I mentioned the 30000 and 30060 example to illustrate that someone might not necessarily drive a full tank and then fill it up again; which I further used to illustrate that using the litres/100 kms would give the owner a broader perspective.

I've added that the FE cannot be different, regardless of method.
libranof1987 is online now   Reply With Quote
Old 26th May 2011, 20:10   #22
BHPian
 
Pri2's Avatar
 
Join Date: May 2009
Location: Bangalore / Mangalore
Posts: 194
Thanked: 87 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

Quote:
Originally Posted by noopster View Post
Forgive me but this is silly. You DO realise that you're measuring exactly the same thing, right? Meaning if someone says 8 kmpl, doing the math to get 12.5 lit/100km or 1250 lit/10,000 km is just a quick step away. So what difference does it make?
I am not saying that they are any different, they are exactly the same thing, but when it comes to understanding fuel economy, I feel liters /100 kms gives you the better picture.

As someone has already pointed out on this thread, here is an example:

Say you have an old Indica that gives you a FE of 15 and you decide to upgrade to a Indica Vista that gives you a FE of 20 KMPL. The FE gain here is more than upgrading from a Vista (20 KMPL) to the 25 KMPL Indica.
Though you can see that the FE increment is just 5 kmpl. For a person who calculates in KMPL the gain will seem to be same > 10kmpl - 15kmpl - 20 kmpl but for someone who calculates in liters / 100 kmpl the gain is : 3.33 liters - 1.67 liters - 1 liter.

I agree that we have grown up following KMPL hence it easier for us to understand it, but if you look logically, liters / 100 kms gives you a better picture on FE and that's my point.
Pri2 is offline   (2) Thanks Reply With Quote
Old 26th May 2011, 22:04   #23
Distinguished - BHPian
 
dhanushs's Avatar
 
Join Date: Oct 2009
Location: Bathery/BLR
Posts: 3,446
Thanked: 4,055 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

Quote:
Originally Posted by Pri2 View Post
Say you have an old Indica that gives you a FE of 15 and you decide to upgrade to a Indica Vista that gives you a FE of 20 KMPL. The FE gain here is more than upgrading from a Vista (20 KMPL) to the 25 KMPL Indica.
Though you can see that the FE increment is just 5 kmpl. For a person who calculates in KMPL the gain will seem to be same > 10kmpl - 15kmpl - 20 kmpl but for someone who calculates in liters / 100 kmpl the gain is : 3.33 liters - 1.67 liters - 1 liter.
Umm.. Pri2, isnt it obvious?. That 15-20 is not same as 20-25?. A simple % increase calculation will show. And that too while making a buying decision, one will definitely make it. The way I calculate cars efficiency is rs/km. . More confusion?

Last edited by dhanushs : 26th May 2011 at 22:05.
dhanushs is offline   (1) Thanks Reply With Quote
Old 27th May 2011, 09:45   #24
BHPian
 
Join Date: Jan 2007
Location: Pune
Posts: 258
Thanked: 26 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

I would prefer the best way of Rs/km. This is used for rickshaw and taxi fairs and also bus etc.
So its but natural to use this. It will really tell you what is the car costing you per month in terms of fuel cost.
subscrive is offline   Reply With Quote
Old 27th May 2011, 10:04   #25
BHPian
 
mmxylorider's Avatar
 
Join Date: Feb 2010
Location: LA, CA
Posts: 654
Thanked: 184 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

I believe when you are travelling ,say 500 kms, and want to budget for fuel, L/100km might be helpful rounding off liters to next higher numbers. Most people have a fair idea about quantity of fuel remaining in tank and this might help more easily in planning for refuel stops, in case car not equipped with MID.
mmxylorider is offline   Reply With Quote
Old 27th May 2011, 14:18   #26
BANNED
 
Join Date: Sep 2007
Location: Bangalore
Posts: 813
Thanked: 220 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

I was confused with liters per 100 km concept when I first saw it in the Beemer. Even the instant mileage is represented as liters per 100 kms and I was doing the mental mathematics to calculate the FE. May be it is a matter of getting used to, but my preference is KMs/Liter
gadadhar is offline   Reply With Quote
Old 27th May 2011, 14:59   #27
Senior - BHPian
 
DieselFan's Avatar
 
Join Date: Mar 2007
Location: Bangalore
Posts: 1,570
Thanked: 233 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

Lts/100 kms is suitable for all Cost and ROI calculations. Even if we have KMPL we finally convert it in terms of lts/xkms to arrive at the Costs/ROI calculations.
DieselFan is offline   Reply With Quote
Old 2nd June 2011, 08:28   #28
BHPian
 
kunalsb's Avatar
 
Join Date: Apr 2011
Location: Bhopal/Mumbai
Posts: 69
Thanked: 60 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

The basic aim of these methods is to know how much you spend on fuel. Hence I practice the following:-

1. I prefer to stick to kmpl. I follow the practice of calculating on a full tank method, so it gives a more accurate consumption value & also automatically takes into account the distance covered (be it City/Highways).
2. I set my trip to zero at the beginning of the month & at the end of the month I get the total distance traveled, so I can roughly arrive at the amount expended on fuel for a month.

You use any method, the money expended on fuel is going to be same
kunalsb is offline   Reply With Quote
Old 2nd June 2011, 08:44   #29
Distinguished - BHPian
 
condor's Avatar
 
Join Date: Jun 2006
Location: Speed-brkr City
Posts: 10,750
Thanked: 4,340 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

Measuring fuel per 100 km is easier when you have the FE measurment rig hooked up in your car. For my regular checks, I prefer to measure distance for fuel filled. The preference for the second option is that I can fill fuel upto near the cap (in the fuel tank inlet), drive sufficient distance and then fill fuel again upto the same point. While this method is not 100% accurate, it is the best & easiest I can do in regular usage.
condor is online now   Reply With Quote
Old 2nd June 2011, 10:15   #30
dot
Senior - BHPian
 
dot's Avatar
 
Join Date: Dec 2007
Location: Ban Chang
Posts: 1,681
Thanked: 714 Times
Default Re: Measuring fuel economy- KMPL VS Liters/100 kms - Which is better?

As everyone here agrees, the end result is same, it is just a matter of convention. Like using metric system and fps system for the same thing.

Since we are accustomed to km/l, why not stick to it.
dot is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Government wants corporate average fuel economy of 18.2 kmpl a4anurag The Indian Car Scene 21 2nd June 2016 21:03
Which is better - A car which has driven 1 lac kms in 4 years or 35,000 in 6 years syravi Technical Stuff 41 7th May 2016 16:21
Mumbai-Shirdi-Mumbai: Same day, 36 liters of fuel, Automatic City sawnilrules Travelogues 0 19th May 2013 19:59
Which bike for the best fuel economy ? raghutk Motorbikes 64 26th March 2012 23:27
Great Article on measuring Horsepower GTO Technical Stuff 4 1st May 2004 00:17


All times are GMT +5.5. The time now is 08:58.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks