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  #13  
Old 10-12-2013, 04:30 PM
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Re: fuel additives

IMHO, personally it is an annual thing for a couple reasons:
Even with top tier fuels, there are still deposits accumulated on injectors. Some of these are actually detergents left behind when the fuel flashes off at the nozzle itself. I have a friend with an injector flow meter. I have seen the results of before/ after on my race bike injectors. Granted, the engine spends its life at 15,000 rpm, but it uses top tier pump fuel.
Valve overlap. There are times in the combustion cycle when both sets of valves are open to exhaust gasses. The carbon build up can settle on both intake and exhaust surfaces. It accumulates on piston crowns too. Sure, there are detergents in fuels to help prevent this. They do a great job when you are doing highway cruising. However, how many of us really spend more time cruising over stop n go traffic? Acceleration and deceleration are times where incomplete combustion happens most often.
FI cleaners, especially the ones formulated for ethanol fuels, do a good job of cleaning up what gasoline detergent leaves behind. They generally work by burning hotter and "cooking off" the deposits. They also help rid the fuel system of corrosion deposits left by moisture trapped within out corn based alcoholic fuel.
Like I said, it is an annual thing for me. It doesn't hurt, it's cheap and since I tow a good bit, there is a better chance my combustion is not as complete as it could be.
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Old 10-12-2013, 05:02 PM
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I used to put it in my 4 runner every 4 months and would add a moisture remover in the winter time to get water out of the fuel lines.
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Old 10-12-2013, 05:28 PM
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Re: fuel additives

Coking deposits accumulate on the intake valves no matter what fuel is used. It's a good idea to use Techron or a product that cleans the valves and fuel delivery system.
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Old 10-14-2013, 08:14 AM
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On old escort it got to the point where I was getting below 20 mpg. I filled the tank and dumped Lucas fuel injector cleaner in it, ran the tank almost dry and kept track of the mileage after that, I picked up 6 to 7 mpg's just doing that alone. Now to be fair it had about 150000 miles and had never had the injectors cleaned but still that is a big gain for a $4 bottle.
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Old 10-14-2013, 08:19 AM
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Re: fuel additives

Quote:
Originally Posted by loveracing1988 View Post
On old escort it got to the point where I was getting below 20 mpg. I filled the tank and dumped Lucas fuel injector cleaner in it, ran the tank almost dry and kept track of the mileage after that, I picked up 6 to 7 mpg's just doing that alone. Now to be fair it had about 150000 miles and had never had the injectors cleaned but still that is a big gain for a $4 bottle.
must have been kind of a satisfying cheap fix for $4
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