Salam to All....well guys thanx for waiting for my experimentation. The delay for posting my experience was because i just wanted to be sure of my results.
What i experimented was i took out the iridium plugs from my aqua about a week ago. I was getting around 20km/l with those plugs on my daily usual driving on the same routes and almost at the same time. So i removed the denso Iridium plugs FK-16R from my ride and i replaced them with the Conventional NGK plugs BKR6E.
I used a feeler guage and set the plug gap at 0.5 mm. Thats 0.020 inch.
I drove the car on the usual daily routes at the daily routine timings with the normal light foot that i usually use. The fuel average that i got was 18km/l approx.
I again took out the plugs. The plug gap this time was widened to 1mm using feeler guage. Thats .040 of an inch.
Again i drove the car at the same routes with same daily timings getting the same amount of traffic that i usually do. The fuel average this time was 20km/l...
I took out the plugs again. The gap this time was adjusted at 1.5mm. Thats .060 of an inch.
Again the same daily practice of driving..................................and the fuel average jumped to 22km/l....
This average that i got was without iridium plugs, using the conventional NGK plugs, but with little bit adjustment.
I must tell u guys that the minimum driving criteria in each experiment was more than 80 kms of drive within the city.
The drive was on the same daily routes and the same daily timings.
From my home at mohammad ali society to my office at Metropole around 9am in the morning. From my office back to my home around 2 pm in the afternoon. From my home to my clinic at Gulistan e johar at 7 pm in the evening and then back to home at 12 to 1 am in the night.
In all the 3 plug gap settings experiment, the routes and timings didnt change and so was the driving style. AC was on all the time with the climate control at the same level. So i got the same amount of traffic. And i repeat......more than 80 kms of driving was done with each set of the plug gap.
For the final confirmation i drove again with 1.5mm gap. But this time it was not with light foot. This time i drove like a normal car. I stepped on the accelerator many times......i over took many cars and i exceeded 90km/hr on the speedometer many many times. The fuel average this time is 21.5km/l approx...(H)
Now guys i'm not sure what is the OEM plug gap for Aqua..... couldnt find it in the manual....but i think it should be around 1.5mm or close to that.....can anyone plez confirm??
I'm not planning to go for a 2mm gap experimentation............Why???? Or should i...???
Mere ustaad mohtaram.....mere marhoom khaloo (Allah un ko jannat naseeb karay), apnay zamanay k buhat barray or achay mechanic thay. Maine cars ka mechanical work unhi se seekha.....apne specialization k liye USA janay se pehle. Unho ne mujhe sikhaya tha k plug gap ki minimum setting jo tum rakh sakte ho wo .5mm hai. Is se kam mat rakhna warna spark itna weak ho ga k shayd fuel complete burn na ho sake. or plug gap ko 1.5 mm se exceed mat karna. warna ho sakta hai k wide gap ki waja se plug misfire kar jaye or engine ki missing shuru ho jaye...
It is important to note that it is not advisable to alter the preset gap in iridium plugs. So i have to use the NGK plugs for this experiment.
What i have concluded for all the guys complaining about decrease fuel average for some reasons...
Plug gap adjustment is critical. Most of the mechanics do not adjust the gaps using a feeler guage therefore optimal fuel efficiency cannot be achieved.
Do not use tyres and rims that exceed the recommended specs. Heavier tyres and rims do consume more fuel.
Use a good quality of air filter. A proper ratio of the mixture of fuel and air is a must for good fuel average.
Get ur car serviced at least once a month. Mud and the dust tends to collect in the suspension and tyres increasing friction and resistance as well. A clean suspension is another plus for a good fuel economy.
Discussion open to all the mates....(H)