Team-BHP - The Fuel Additives Thread

Quote:

Originally Posted by shankar.balan (Post 2811055)

If the effect is so positive, then why do they clearly recommend against the use of these things in the modern Crdi engines? I understood it is because it leaves a sticky gummy deposit in and around the fuel injectors which has a detrimental effect!
Clarifications welcome!

What I am told is that many CRDI engines tend to smoke on acceleration with Premium Diesel and maybe System D. Hence Premium Diesel was also not recommended.

I am not sure whether it was a effect of the clean up or did it persist. I will suggest what I do (with G) - add it once every few fills.

Thanks but I don't think I will risk these additives in my Yeti.
Don't want to gum up the works, quite literally!

Quote:

Originally Posted by sgiitk (Post 2844347)

The quality of Iftex is not as good as its supposed to be. I do not recommend use of G or D in any car. If at all someone wants to use an additive, use a dependable product that has been brought in from abroad by some marketers.
I used Redex in the old days in carb engines and it did wonders. In modern fuel injection and with metallurgy changed for the valves and seats, and design for unleaded, these additives are really not required. Maybe once in a few months a little spray of carb cleaner thru the intake should clean the throttle body, injectors and valve body etc of deposits.

I've been using Iftex System-D in my Xylo mEagle, but not very regularly. Once I buy the bottle, I use it consecutively for 3-4 tank fulls and then leave the bottle aside for another 8-10 tank fulls. Then again repeat the process. Also, while going on long trips, most of the times I have added. My dosage is always bit less than 1ml / litre. Its been quite long that I've just been on normal diesel; Premium diesel isnt available easily on my regular routes.

My observations: after adding, in most cases, the DIS console generally shows an increase in mileage (fuel economy) by +1 (decimals not shown) and the actual mileage (tank-full method) also shows 0.3-0.8 increase. Noteworthy, my route remained exactly same before and after this additive, in city roads where speeds varies between 0! to 60, and average speed as in DIS shows 30-40! Though long trips are not very frequent, but whenever done every few months, I do get a chance to accelerate beyond 100, which ofcourse breaks the mileage. But, I read somewhere that sometimes spirited drives will help “cough-out” and kinda automatically decarbs the system. I can safely assume a positive impact of having combination of such drives and system-d.

FYI, at different intervals, I did try 2-3 times adding 2T oil to diesel tank (~0.8ml/litre), but was always worried of negative effect, and also wasn’t able to gauge a positive impact (engine smoothness, mileage) in actual.

Since, system-d hasn’t shown a direct negative impact (havnt seen, so don’t know of the engine internals!), I would not mind continuing my process. Experts and Xylo users can pour their valuable comments.

thanks,

Dear Motorists,

I have some info on this as I am working for an Oil company.

1. Fuel additives are generally detergents with some lubricating properties. They work by cleaning the gumming left by fuel as it polymerizes under heat and pressure at injector nozzles, valves etc.

2. System G & D and other additives meant for Petrol & Diesel are designed to clean polymers left by these two differing Hydrocarbon mixtures. Diesel additives are generally stronger as Diesel contains more aromatics, and branched hydrocarbons.

3. Oil Companies generally do not manufacture these additives but endorse them to earn some revenue.

4. OEMs do not endorse these additives as it is expensive to study the effects of these additives over long terms on an engines performance. No additive manufacturer is willing to foot the bill for such testing. Also the effects these external additives have on your Catalytic converter and other Exhaust Gas quality sensors are undocumented.

5. Additives were important when we were getting plain Vanilla Petrol & Diesel as the specifications of these products was very wide and Oil companies could play with the composition resulting in large amounts of aromatics & branched hydrocarbons (which polymerize easily), not to mention sulphur passing into both fuels.

6. With the advent of Euro III (Available pan India) & Euro IV fuels (available in Metros, and will be available pan India by 2013), external additives are not very useful, as these fuels already have a “keep clean” dose of Approved & Tested additives in them. Also Euro IV fuels have an extremely tight specification range and mostly have straight chain hydrocarbons, therefore have lesser concentration of Hydrocarbons that will gum/ polymerize under heat and pressure.

7. Unless you have had a brush with adulterated fuel and your injectors are getting clogged, external additives are not required. Any such defect can easily be corrected at the ***.

Hope the above Helps.
Happy & safe Motoring.

Quote:

Originally Posted by swarnava.m (Post 2659493)

I don't know whether this has already been discussed on this thread before, but today I discovered a major discrepancy in the measurement nozzle on the System G bottle.

For those who have used it, you must have seen that there are 5ml and 10ml markings on the nozzle at the top of the nozzle, and we squeeze the bottle until the liquid fills up till the desired level. I observed that the small mark above the 5ml engraving, which should be considered as the reference for measuring the quantity, is very much inaccurate. It is actually much closer to 15 ml.

5 ml is approximately filling up the lower conical part of the nozzle, till the point where the shape of the nozzle changes into a straight cylinder. I have measured it using a laboratory measuring bottle.

I am not sure why this discrepancy is, but it could be an unfair marketing strategy by IFTEX to ensure that the contents of the bottle are used up quicker than normal, thus boosting sales. I have had only 2 tankfills with System G before this, and am not sure whether the additional quantity I have added has caused any harm to my car. Touchwood!

If anyone else has observed anything similar, kindly share your views here.

This post seems to have gone unnoticed. It's a scandal, if true. Those guys deserve to have their pants sued off them :O

Quote:

Originally Posted by swarnava.m (Post 2659493)

.. but today I discovered a major discrepancy in the measurement nozzle on the System G bottle.

.. there are 5ml and 10ml markings on the nozzle at the top of the nozzle, . . I observed that the small mark above the 5ml engraving, .. is very much inaccurate. It is actually much closer to 15 ml.

Quote:

Originally Posted by Athani (Post 2883349)

This post seems to have gone unnoticed. It's a scandal, if true. Those guys deserve to have their pants sued off them :O

Guys, please check before you post something like this. The markings on the bottle are very much Accurate. The 5ml is exactly at the mark on the bottle, and the 10ml is reached when the letters "10 ml" are covered. I did a double check by pouring 5 ml & 10 ml of fluid into a used bottle.

@Swarnava, I'm sure such measurements have to go by the weights & meaures dept. Also, this measure is easily verifiable, and the company would not do such a mistake.

Quote:

Originally Posted by condor (Post 2909027)

In that case, I have a doubt that what I received is not a genuine product. I will click some pictures and post them, to justify my claim. It can be easily seen how inaccurate the measurements are. In my opinion, it is not that the company is not aware that such measures can be verified, but its more along the lines of the company believing that very few people, if any at all, would go to verify these measurements.