Go Back   Team-BHP > BHP India > The Indian Car Scene


Reply
 
Thread Tools Search this Thread
Old 7th July 2010, 21:34   #31
Senior - BHPian
 
AbhiJ's Avatar
 
Join Date: Jun 2008
Location: Kolkata
Posts: 1,298
Thanked: 462 Times
Default

My i20 CRDi has become more fuel efficient.... is the CRDi mill BS4?
???
AbhiJ is offline   Reply With Quote
Old 16th July 2010, 16:36   #32
Senior - BHPian
 
lamborghini's Avatar
 
Join Date: Apr 2004
Location: Mumbai
Posts: 4,636
Thanked: 1,262 Times
Default

Hey guys,
sorry to bump up this old thread.
I checked out our Fiesta's FE for the last 2 refills, and it has been hovering around 12kmpl.
Even though there are a lot of factors affecting this, such as shorter city drives, increased traffic in commute, etc., there is no denying that there has been a reduction of around 1kmpl here as well.
AbhiJ, if your i20 has a 6speed gearbox, it is BS4. Also, if you car is new, and the run-in period just got over, there should be an increase in FE.
lamborghini is online now   Reply With Quote
Old 17th July 2010, 11:06   #33
BHPian
 
mtnrajdeep's Avatar
 
Join Date: Feb 2006
Location: Bangalore
Posts: 647
Thanked: 88 Times
Default

Even I was wondering what the reasons for my Swift's reduced mileage could be! Then I see this thread! For the last 3 months, I too have observed that my Swift VDi's mileage has dropped by about 1-1.5 kmpl! I was getting close to 16.5-17 kmpl in my daily routine drives and now this has come to 15-15.5 kmpl. Anyway, the car is due for a service and once I get the service, I will recheck the mileage.
mtnrajdeep is online now   Reply With Quote
Old 17th July 2010, 11:43   #34
BHPian
 
babhishek's Avatar
 
Join Date: Sep 2006
Location: KOLKATA
Posts: 315
Thanked: 14 Times
Default

hmm, interesting feel a subtle drop in mileage worth investigating...
babhishek is offline   Reply With Quote
Old 17th July 2010, 12:36   #35
BHPian
 
Join Date: Aug 2009
Location: Bangalore
Posts: 359
Thanked: 55 Times
Default

This could be true. I checked the FE of my Getz (tankful to tankful method). I was trying to drive very carefully and used AC very less, hence was expecting I will get 12kmpl (used to get 11-11.5 earlier). I have got 11.5 now. This time I filled from Shell. Will see if Shell regular gives same or better FE
mohan41 is offline   Reply With Quote
Old 17th July 2010, 14:43   #36
CPH
BHPian
 
Join Date: Jan 2010
Location: London
Posts: 577
Thanked: 33 Times
Default

Quote:
Originally Posted by babhishek View Post
hmm, interesting feel a subtle drop in mileage worth investigating...
Read post #8! I wrote this post not for nothing.

The presence or lack of elements/molecules in form of additives or as part of what the crude oil contains affects how the chemical reactions take place. The complexity is beyond what the human capability can comprehend. What we can comprehend is the way it influences the flame front development.

Since time is of the essence and expansion as a result of the combustion process must not exceed the boundries of a set window in terms of crank shaft angles related to the piston - it will become quite clear that the different additive package/crude oil residues, would shift the combustion out of the window. The fuel becomes for the set-up inefficient.

The flame front speed is for any set fuel constant regardless of the rpm. The problem is that with increasing rpm the window is exceeded further one or the other direction.

Therefore the ignition timing has got to be corrected.

It is known to the industries for many years. Even magazines have made endless tests on fuels, where some fuels made more power than others on the very same engine and showed different fuel consumption figures. Differences of up to 12% have been measured.

The fuel coming out best in one car does not need to be best on a different engine as the map in the ECU will most likely be set for a different fuel.

When we re-map cars, which we do only on the dyno we usually tell the owners of the respective cars that if they want to have the best result they need to use one type of fuel and this is the one they should come with in the tank, but it has to be at least the third tank load as cross contamination might affect it very badly.

High octane fuels do not necessarily male the car more fuel efficient. They contain flame inhibitors that allow for higher compression without spontaneous combustion (pinging).

To get the best result for your engine use what is specified or have the ECU re-mapped accordingly.
CPH is offline   Reply With Quote
Old 18th July 2010, 18:14   #37
BHPian
 
Join Date: Jul 2007
Location: Mumbai
Posts: 133
Thanked: 35 Times
Default

My Fiesta TDCI too is down on the FE by 2-3 Kmpl. Is there something we can do about it?
chittybang is offline   Reply With Quote
Old 18th July 2010, 18:42   #38
BHPian
 
asdon's Avatar
 
Join Date: Dec 2007
Location: Bangalore
Posts: 950
Thanked: 293 Times
Default

I take my words back, I just changed my 4 tyres which were 38000km old, and put xm1+, and went to goa with 5 adults on with full boot in an Alto and because it was a night drive AC was off, and I drove 655km with 30Ltr normal Petrol filled from BP.And before the journey when I started from Petrol pump to home odo reading was 31, so it was 686km in 30ltrs, milage - 22.86
asdon is offline   Reply With Quote
Old 19th July 2010, 11:46   #39
Distinguished - BHPian
 
sgiitk's Avatar
 
Join Date: Dec 2007
Location: Kanpur
Posts: 7,160
Thanked: 3,755 Times
Default

Quote:
Originally Posted by raghosh View Post
.....
, it shows 2 different FE figures for BS-III & BS-IV . Does it mean Hyundai has 2 different engine variants to offer or the same engine with 2 fuel grade figures ? .....

...There has been a slight upward pricing of the both petrol & diesel after the enforcement.
Due to the tightening of the pollution norms the position and size of the Cats etc. has been revised. Changes are more for the diesel than petrol vehicles. One example of lateral thinking is Toyota Innova. Instead of re-jigging the exhaust, they added an inter-cooler to increase the power, and then changed the final drive ration.

What I understand is that the PSUs are having problems in scaling up production to BS3 from BS2 rather than from BS4 to BS3. There was a demand to defer the latter. The price increase is also more due to the BS2/3 issue.

Can anybody confirm that the old BS2 is history and petrol / diesel in non-13 cities is now BS3.

Last edited by sgiitk : 19th July 2010 at 11:47.
sgiitk is offline   Reply With Quote
Old 19th July 2010, 12:18   #40
CPH
BHPian
 
Join Date: Jan 2010
Location: London
Posts: 577
Thanked: 33 Times
Default

Quote:
Originally Posted by chittybang View Post
My Fiesta TDCI too is down on the FE by 2-3 Kmpl. Is there something we can do about it?
Re-mapping is the most efficient way to do this
CPH 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
Chevrolet offers free vehicle pick up & drop-off to lady car owners Redline6800 Indian Car Dealerships 11 23rd March 2013 20:00
Letting your Car's fuel tank run empty? Drop the habit! searchingheaven Technical Stuff 32 25th January 2013 23:17
MM540 2WD to 4WD - Mileage drop after conversion yamaniac 4x4 Technical 7 29th February 2012 20:02
Sudden Drop in Fuel Efficiency. What could be the cause? ashwin390 Technical Stuff 2 15th June 2011 21:49
Fuel prices may drop soon NetfreakBombay The Indian Car Scene 67 30th October 2008 20:51


All times are GMT +5.5. The time now is 10:02.

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