ARTICLE: How to get the maximum Fuel Efficiency

[sidcruise79]

I guess the best option is to keep the tank always above the half mark and as mentioned by Raccoon get it down to 4-5 litres every quarter. Maintaining fuel above the half point would also prevent rust formation in the tank, if I am not mistaken.

[tj123]

Originally Posted by Gansan

How can this be accomplished? There always will be some fuel in the tank.

Will it be a good idea to maintain the tank half full, and top up as soon as it reaches this mark? For me this will be about once a month. Can this cause any issues?

What I meant by “emptying” means that you should go the lowest possible safe fuel level 3-5 lits (in most cases) before refueling.

Actually the idea is to have minimum amount of stale fuel in your fuel tank to reduce gum build up in fuel tank, lines & carburetor/ fuel injection components.

Keep in mind that stale fuel rapidly catalyzes and aids rapid decomposition of the newly added fuel. Hence try to deliberately "empty" your tank at least once in a quarter.

[mobike008]

Originally Posted by sidcruise79

Maintaining fuel above the half point would also prevent rust formation in the tank, if I am not mistaken.

This applies only to those cars which run below normal mileage in a month. For cars which run atleast 500kms a month no such precaution is required.

[archat68]

Originally Posted by Roy.S

Looks interesting. Where is this available? 2.5% error is acceptable. I would want one of these just to get a basic idea of the FE. A real-time FE readout would probably help fine tune my city driving.
Highway driving is usually pedal to metal and 'to hell with FE' in my case, but the car always returns 16 kmpl.
EDIT: The device itself looks a little badly put together esp with the exposed wire. Can the display screen be mounted in the dash. In my swift, I'd prefer to put it below the HU.

Originally Posted by gpa

Seems like an intriguing device. Am keen to know where I can get this.

Kindly shed some light on the same.

Thanks in advance,
gpa

There is already a device called Scangauge.
Here are some links:

ScanGaugeII - Trip Computers + Digital Gauges + Scan Tool
http://www.team-bhp.com/forum/modifi...n-gauge-6.html (Scan Gauge)

[Roy.S]

Originally Posted by archat68

There is already a device called Scangauge.....

Indeed there is. But there is some amount of pleasure to be derived from building and configuring a DIY and I'd like that. Plus, why ship it from abroad when you could build one?
Prasad, what about further details.

[9216]

Originally Posted by Roy.S

I am very interested in knowing how you have worked this out. Could you give us some details?
In case you are looking for Beta testers, I volunteer. If a DIY device works with an error of just 2.5%, it certainly has my .

Originally Posted by gpa

Prasad,

You have come up with a good device.

I too volunteer in case you need a beta tester. What are the bugs you are facing in terms of the software? Is this something your planning on ironing out soon?

gpa

Originally Posted by Roy.S

Indeed there is. But there is some amount of pleasure to be derived from building and configuring a DIY and I'd like that. Plus, why ship it from abroad when you could build one?
Prasad, what about further details.

First of all I want to apologize for not responding for a long while. Things kept me too busy.

I very much thank for your encouragement and offers for testing. At present I only have my prototype. I shall definitely get back to you a little later on.

I am using a small microcontroller in the device that takes signals from vss and injector drive. At present it works fine. Had a problem just once, when the total fuel logged was zeroed unexpectedly, giving junk data for fuel averages. Have done about 650km since and the problem has not repeated, but its too early. Should be a bug in the code, and am trying to fix it.

As of now, the device is designed for Alto only, but should be very easy to adapt to any vehicle.

The accuracy of about 2.5% is my estimation. My efforts to calibrate fuel consumption thru' MASS (two of them) have not been fruitful, since they didn't seem very enthusiastic. Driving style may affect accracy, since only one injector signal is used. (This is to minimize interface requirements).


I started this out for fun about 2 years back, but after one or two initial tests had to be kept in cold storage for want of a test vehicle (All cars I had access to at that time were carb types. I got my new Alto only in Mar09). MASSs were not helpful either.

I have heard about OBD in newer cars, but I could not confirm whether cars like Alto conforms to it. Any info is very much welcome.

Prasad.

[Gansan]

Originally Posted by mobike008

This applies only to those cars which run below normal mileage in a month. For cars which run atleast 500kms a month no such precaution is required.

How come? If you run it for 500 KM per month but fill only 10 litres per week (as and when it touches reserve), the top half of the tank can still rust. This may not happen anytime soon though, as I think the tanks are galvanized.

[gobarboss]

Great Article. Though one query.
I own an Accent GLS 2001 Model. The clutch has been a regular trouble in it. Its giving me an mileage of 7-8 kms. Though the engine has done only 23000kms (SHOCK). So I took to an experienced mechanic. He drove it around for 2 mins. He was ready with sad news. I needed a new clutch plate, pressure plate, gas kit, cylinder. Estimated cost Rs 8-9K. He says the mileage has been eaten up by the problem and it'll gimme around 12 after the repair. Any suggestions ?

[DieselFan]

Originally Posted by gobarboss

Great Article. Though one query.
I own an Accent GLS 2001 Model. The clutch has been a regular trouble in it. Its giving me an mileage of 7-8 kms. Though the engine has done only 23000kms (SHOCK). So I took to an experienced mechanic. He drove it around for 2 mins. He was ready with sad news. I needed a new clutch plate, pressure plate, gas kit, cylinder. Estimated cost Rs 8-9K. He says the mileage has been eaten up by the problem and it'll gimme around 12 after the repair. Any suggestions ?

Clutch can get burnt in a matter of 100 kms. I have seen many inexperienced drivers burn their clutch within 100-200 kms. It can also last as long as 80000 to 100000 kms. I suggest take the car to a Hyundai Authorised Service center and get the problem checked/corrected. HASS is affordable and dependable.

[shantyrocks]

Originally Posted by gobarboss

Great Article. Though one query.
I own an Accent GLS 2001 Model. The clutch has been a regular trouble in it. Its giving me an mileage of 7-8 kms. Though the engine has done only 23000kms (SHOCK). So I took to an experienced mechanic. He drove it around for 2 mins. He was ready with sad news. I needed a new clutch plate, pressure plate, gas kit, cylinder. Estimated cost Rs 8-9K. He says the mileage has been eaten up by the problem and it'll gimme around 12 after the repair. Any suggestions ?

7-8

are you driving with your left foot on the clutch?

[Cyberdoctorind]

Originally Posted by gobarboss

Great Article. Though one query.
I own an Accent GLS 2001 Model. The clutch has been a regular trouble in it. Its giving me an mileage of 7-8 kms. Though the engine has done only 23000kms (SHOCK). So I took to an experienced mechanic. He drove it around for 2 mins. He was ready with sad news. I needed a new clutch plate, pressure plate, gas kit, cylinder. Estimated cost Rs 8-9K. He says the mileage has been eaten up by the problem and it'll gimme around 12 after the repair. Any suggestions ?

What is the gas kit that is referred here? How does the car behave when revved? Do you see the RPM shooting up and no increase in pick during driving?

[gobarboss]

Originally Posted by Cyberdoctorind

What is the gas kit that is referred here? How does the car behave when revved? Do you see the RPM shooting up and no increase in pick during driving?

Guys the mechanic took about 24 hrs to make the repairs. The following things were replaced.
1. Clutch Plate
2. Pressure Plate
3. Master and Slave Cylinders
4. Gear bearing
+ Gear oil

I must say the guy has done a tremendous job on it. Its back to what it was when I rode it 2 years back. He showed me all the worn out material. And great news too, after surfing about 50 threads on the similar issue, I found out that every thing the guy did was indeed recommended here by BHPians.
He charged me exactly Rs 9000.

Well about the improved mileage ??? I'll post about it asap. Needs time.

I'm based in Pune. The mechanic is a very trustworthy guy. Repairs every vehicle. Sheikh Patel Mob. No. 9822406225. Quarter Gate, Nanapeth. Hope others can benefit from it. I must tell you that none of the Authorised Centres could do anything about it in 2 years and multiple checkups. Cheers.

[Vampirelord]

Very informative to say the least. Also, what about choosing the right products for your car's exterior. People usually make do with cleaning it with rugs and car washes. Any recommended products?