I have just added 4 ounces of acetone to my 20 gallon tank in my 2005 C 3.3.

Check this site out for more info:
http://www.metacafe.com/watch/524517...as_mileage_2x/

 

Bad, bad idea. It not only doesn't work, it can damage rubber engine parts.

Read this

Car Talk

 

This is funny. Do you think the engineer got a sweet xmas bonus?

Here are facts:
This Caravan has a 20 gallon tank.

1 gallon = 128 ozs

20 gallons = 2560 ozs.

4 ozs of acetone is .16% of the tanks total capacity.

That is 1.6 tenth of a percent. Think about how small this is.

You may be putting upwards of 10% ethanol in your tank which aint a real good idea for rubber or mpg.

This amount of acetone will be of no effect on your rubber components.

 

I've spent a lot of time looking into this and here are my thoughts--do as you will. Acetone is one of the best carbon removers around and it will help reduce deposits on injectors and help clean carbon from valve stems and piston surfaces. Fuel economy benefits are mixed and inconclusive. In small concentrations as mentioned, it will not harm fuel system components such as pumps, lines. or injectors. I use it as well and I think it helps to keep deposits down over time. I'm not sure if I'm getting any better economy so I only use it for carbon removal. After two years I have had no fuel system failures. Overall, I think the most notable improvement has been with idle quality. Because of the cost of acetone, I'm not really sure if it makes financial sense.

 

I would agree with everybody here it was no value other than to clean things out occasionally, at a previous job I had access to large amounts of it and it never really helped any increase my milage I also sawit on myth busters they tried it on a car and actually got worse milage

 

Despite the test on Mythbusters TV show
and despite the Popular Science magazine test
acetone in gasoline is an
"Internet Myth"
that shows no sign of dying out.

Having watched the 'acetone in gasoline' posts over the last years,
and having gone to some of the original websites claiming how good it is,
I am 90% convinced that it was an 'on purpose'
kinda Virus, similar to computer viruses.

The people who started it are sitting back laughing at the people who fall for it, in a similar way to the motivation of people who set computer viruses loose on the internet.

It is worth noting that you can easily buy both acetone or toulene at a paint store.

Toulene has been proven time after time to improve MPG and slightly raise octane level, but is too expensive to be cost effective.

Acetone has been proven time after time to damage rubber and plastic parts...but the damage does not show up right away and depends on how concentrated the acetone percent in the fuel is.

It was very crafty and devious
for the original people who started the acetone in gasoline myth
to suggest a damaging chemical that was easy to buy
and common enough that people weren't afraid of it,
since so many people in my generation used it to dry equipment in chem lab or when cleaning up after painting.

 

"Despite the test on Mythbusters TV show
and despite the Popular Science magazine test
acetone in gasoline is an
"Internet Myth"
that shows no sign of dying out. "

The fuel economy part may be myth, but the carbon removal issue is based on fact--google it.

 

If it is on the TV then it must be true.

TV told us there were WMD's in Iraq didn't it?

 

Yah--I hear you