Updating this thread after a while. The car has crossed 49K mark and the odo now read 49035.I have around 2571 kms done as per the fuel log app.The cng cost to run the same is Rs7359 + 1000 bucks of fuel which comes to 8359.If i had done the same on petrol i would have needed at-least 233 litres of fuel which @80.5 bucks average would have amounted to 18815 Rs which means i saved upto 10456 Rs.All this is in a matter of 69 days.
I usually would cover 300 to 500 kms in a month. Due to my gas monkeying i have done 2.5k in just 2-3 months.Last weekend i went for long drives all over the city clocking around 200 kms in just two days within the city.
My observations on two most important criteria is as follows:
Performance- There is a drop in performance unfortunately but most of the time it's not significant to impact daily driving.When i floor the accelerator there is a distinct lag in response from the engine.I can time it around 2 seconds during which nothing happens to the speed of the car but soon after that it's like the I-VTEC beast waking up and the car pushes forward though not as eagerly as on petrol.So performance can be said to have taken a minor hit by 5-7 %. The car does feel a bit strained on a incline.The solution to this could be better tuning of the CNG kit and switching to fully synthetic oil.
Fuel efficiency- The FE has gone up now and it's now comparable to smaller engine cars like the Alto (in petrol mode).I have managed a best 19.49 per Kg and a worst of 11.85 per kg with a overall average of 14.5 per Kg.The best mileage was arrived driving on highways with 50% a/c and in solo mode.Not bad for fairly large car.
So for now it has been a good experience with the CNG , touchwood.The jerking problem is still there and even though they claimed to have taken care of same during the service when i had given the car yesterday it seems to not have been resolved.I guess i have to live with it for now.
Also gave the car for a general service at my old trusted mechanic joe from Nakita motors.
I have now switched to shell helix ultra 5w 40. The engine,which was previously running on Total 10w 40, now feels a bit smoother and definitely a bit more responsive.I wanted Total 5W 40 oil but it was available only in june 2013 packs which were a year old so i settled for the shell.It cost me 3800 @ 950 bucks a litre.I am yet to drive the car extensively as i arrived home after a tiring day from joe' garage.
I also got the rear left reflector tail light replaced as the original one was broken at places and would collect water when it rained.It had also had a healthy fungus/greenish thing growing inside of it and looked hideous.The replacement one cost me 1950 bucks from prakash motors and is of the Depo make with a made in Taiwan packing.It looks very much like the OE and there is no difference.
A couple of other things taken care by Joe was the rear seat bottom had become loose and would rattle incessantly and was very irritable.Also it would move when someone sat on it.Joe fastened the seat in a typical Indian jugaad style as the fasteners had broken.He inserted a couple of grinded metal inserts under the seat fastener to secure the seat in position.Now the rattle is gone and the seat does not jostle around when someone is seated on it.
The brake switch stopper had become brittle and had broken.This happened at Suraj Auto and the lights wouldn't go off even when the pedal was released.So the guy at Suraj Auto removed the socket and i drove back home without a brake light yesterday relying on luck and hand signals when slowing down to a stop.Joe fixed the same and and now it is back to normal.Frankly the brake light was working when i had given the car to Suraj auto and i guess someone must have hit the pedal hard for the stopped to break. The service at Joe's cost me 1280 bucks.
Below are some pics.
Shell Helix Ultra 5W 40. The engine has become a bit smooth and better reponsive.The oil is suppose to have a drainage interval of 10K.
Now don't we all love neatly packaged stuff.
The Depo branded reflector light, made in Taiwan.
