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Old 7th May 2010, 22:37   #1
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Default Ritz ZXi giving low mileage

my Ritz has done 2500 kms.

Ont he first tank-full, it returned a mileage of 10.9 kmpl.
I thought it was OK and would increase after first service.

Then, it went from bad to worse.

10.5 kmpl, then 10.1 and now, just 9.6 kmpl.

The car experiences only intra-city running. With air-con ON all the time

My driving style is such that i get around 0.4-0.5 kmpl less than an average driver.


But this is unacceptable low.

What can be the reason and what can i do about it?

Last edited by jalsa777 : 7th May 2010 at 22:41.
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Old 7th May 2010, 23:02   #2
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Check tire pressure. It should be 33 psi.

Check idle rpm. Should be around ~900 rpm.

If ok, check for CO% and get the vehicle tuned to the optimum at M.A.S.S.

If ok, check your driving style!

Change gears at ideal rpm, accelerate and decelerate steadily.

Check quality and quantity of fuel used.

BTW how did you arrive at this FE ? (Calculation part)
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Old 7th May 2010, 23:04   #3
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Are you filling up from a reliable pump and measuring on tankfull-empty method ?
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Old 7th May 2010, 23:04   #4
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If I were you, I would have asked my friend, preferably light footed , to drive it one day on the same route that you normally take and see the difference. At least you will narrow down to if its you or the car!!! If its the car the try out fueling it from a different bunk.
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Old 7th May 2010, 23:53   #5
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1. The petrol pump i visit, its the same one from where all my other cars are being refulled since almost 15 years now. So, no problem there.

2. It had been driven by someone else who is light footed, same FE.

3. I did tank-full to tank-full runs. Filled, 36-39 litres on an average. The car ran for 350-400 kms.

4. Idle RPM is ideal, 750-900 rpm

5. The tires are filled with nitrogen to 30 psi. There are yokohama a-drives of stock size (i.e. 185/70 R14)

Last edited by jalsa777 : 7th May 2010 at 23:54.
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Old 8th May 2010, 00:03   #6
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Quote:
Originally Posted by jalsa777 View Post
5. The tires are filled with nitrogen to 30 psi. There are yokohama a-drives of stock size (i.e. 185/70 R14)
How do you measure the pressure? I suggest you buy a gauge yourself for more accuracy.
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Old 8th May 2010, 00:03   #7
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Quote:
Originally Posted by jalsa777 View Post
1. The petrol pump i visit, its the same one from where all my other cars are being refulled since almost 15 years now. So, no problem there.

2. It had been driven by someone else who is light footed, same FE.

3. I did tank-full to tank-full runs. Filled, 36-39 litres on an average. The car ran for 350-400 kms.

4. Idle RPM is ideal, 750-900 rpm

5. The tires are filled with nitrogen to 30 psi. There are yokohama a-drives of stock size (i.e. 185/70 R14)
I suppose that the recommended tire pressure is 33 psi. Report poor FE in the next service and see if it improves from then on!
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Old 8th May 2010, 00:25   #8
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Recommended tyre pressure is 29 psi. 30 should be fine as well.

My Ritz ZXI is more or less giving the same mileage. Maybe a KM more than yours. Then again I am still at ~1800 Kms.

I hope you don't spend longs hours waiting in traffic jams. Jams would also affect the fuel efficiency.

Last edited by anupamsinha : 8th May 2010 at 00:28.
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Old 8th May 2010, 00:39   #9
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Quote:
Originally Posted by anupamsinha View Post
Recommended tyre pressure is 29 psi. 30 should be fine as well.

My Ritz ZXI is more or less giving the same mileage. Maybe a KM more than yours. Then again I am still at ~1800 Kms.

I hope you don't spend longs hours waiting in traffic jams. Jams would also affect the fuel efficiency.
Yup. 33psi is for the LXi/VXi. And 29psi is the recommended pressure for the ZXi. Same applies for the Swift as well.
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Old 8th May 2010, 06:48   #10
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  1. Have you accounted for the numerous traffic hold ups in Mumbai?
  2. My suggestion to you is to fill up full Tank,drive the car with ac on an early morning on a route in Mumbai(i'd day EE Highway) for say 3 hrs at 60kmph,then again tank up and see how much you filled.
  3. distance covered/how much you filled second time=mileage.If this is in the region of 15-17 you're fine
The mileage drop(<10kmpl) could also be due to the horrid climate causing teh compressor to be on more than normal.

Last edited by vigsom : 8th May 2010 at 06:50. Reason: addition
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Old 8th May 2010, 16:08   #11
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my daily commute is from dadar to ghatkopar, that too in the opposite direction of the rush.

What are other ritz owners getting in mumbai?
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Old 10th May 2010, 16:36   #12
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Quote:
Originally Posted by jalsa777 View Post
my daily commute is from dadar to ghatkopar, that too in the opposite direction of the rush.

What are other ritz owners getting in mumbai?
Hi Jalsa777,

I am driving Ritz Vxi since one month,Covered approx 400 Kms.in Pune.
All city driving with AC switched on all the time.Average on tak full and tank empty basis is 11.03 ,which is pretty bad as I feel.I am driving at speeds not more than 80 kms as car is till very new.

I hope that it will improve after 1st service,but reading your post,I am worried now.Can somebody help?
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Old 11th May 2010, 10:00   #13
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Red face 11.5 Alto

Hi I get 11.5 w70% Ac on in mumbai traffic only 2nd & 3rd gear no other probs with car. chinchpokili to dadar in traffic everyday.
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Old 11th May 2010, 10:11   #14
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Just ask them to check the tappet setting. This is a common problem. Quality control is not very good. A fellow BHPian had the same problem with an Alto and MASS couldn't figure it out. Finally he got it checked it elswhere and the tappets were wrongly set. 2 over tight and 1 loose. After setting it properly the problem was resolved. MASS of course claimed that the car was normal and the low milege was also normal. Try getting this done by a reliable workshop rather than at a MASS.
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Old 11th May 2010, 10:23   #15
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Tuning is possibe on engines with MPFI technology? on old days heard of tuning on engines with Carbs.
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