Seafoam!!!
 

always used it on all my other cars and ws a little hesitant to use it on the 8 but omg i love the results so far. filled up a tank ago and added whole can ( didn't go through main vaccum line like i usually do) but still great results. waiting to see results for mpg and will keep you posted. 2 cents based on octane booster discussion. :)

you put it in your fuel tank?

i was unaware that this was an acceptable method.

Has there been any research of long term use of the product on rotary engines????:uhh:

there will be now

Here's the different gas engine applications:
http://www.seafoamsales.com/motorTuneUpTechGas.htm

Good Stuff
 

Looks as though this is good stuff especially if your car has been sitting a while. Ex. Putting it up for winter.

I've used it two or three times on the RX-8. Went through vacuum like the water treatment process for rotary engines. It causes a CEL for a few cycles, but after that everything goes back to normal.

I can't claim any tangible effect. The engine has 60K on it and still pulls as strong as always before and after.

Plenty of guys use it on their RX-7's. I haven't, but some guys swear by it.

gas tank is totally acceptable, works like a champ so far. still get the kitty litter smell through the first tank, that should go away soon though. so far i like it.

just remember that when you vacuum hose it in if you do not give the correct RPMs to open the secondary valves it will begin to collect behind them.

I used this on my motor after finding out I might have a side seal going out. I sucked a cup full through the intake, then when for a spin, then did another cup. I honestly think it made a difference. My exhaust tip was all carbon'ed up after going on my drives, and the engine felt like it revved a little quicker.

I know some RX-7 guys have used for years, doing periodic treatments, and swear by the stuff. But some of these people are love Marvel Mystery oil for premixing, so.....

I am going to get a compression test done soon, and if my numbers come back up then we will have concrete evidence that Seafoam actually does something.

I Have used this for years in my piston powered toys with good results. Let's see.

my best friend put this in his bmw e30s and claimed vastly reduced gas mileage. he said it smoked like crazy and cleared it very well. but then it gets worse gas mileage?

he has been known to tell a few tall tales though. :)

looking forward to hearing long term reports of gas tank application. vaccum i have no doubt about and it something i will be doing soon. just never heard of fuel tank application before

the directions on the can say gas tank use is acceptable

It could be that some of the carbon in his engine was helping to seal the combustion chamber, with it gone the seals weren't as good leading to lower MPG. Its just a theory so I could be wrong but mabe thats what happened.

thats what he claims. but i dunno, it sounds dubious to me. that would mean his pistons or the chamber itself are heavily damaged. and the car doesnt feel like it has any loss of power. (it does have about 185k miles on it.)

well so far the the throttle response does seem better. i do not get that much of a hesitation any more around midband, the gas mileage will have to wait till i fill up next tank as i know this one will be inaccurate due to me driving so hard to try and clean out deposits. white smoke is minimal (as some of you may know who have done this before, through the vaccum it pours out). i do like what i see so far.

i don't see any reason for US to use it thru the vacuum lines... we got no valve train to clean and we also got plastc manifolds, remember? maybe something light to get around the immediate intake opening, but thats it. this stuff should go in the gas tank for the best results in my opinion.

I SeaFoam'ed my motor several months ago when I noticed that my idle vacuum had dropped from 62 kPa to 56 kPa.
I hooked up two vacuum hoses to the two "nipples" on the lower intake manifold (the ONLY right place to do it on the Renesis because of the intake valving) and ran a half can through the motor.
Made a huge cloud, the motor ran like hell for 1/2 day and then my idle vacuum went back up to 62 kPa.
My compression went from mid 8'2 to low 9's with the old-style starter motor (230 RPM).

I've used seafoam, goodstuff! If you need something stronger try some BG44K. Also works for me.

Hmm. 50 of my posts disappeared somewhere...

I know the feeling.

Musta been Kane deleting his "Auto-Tune" thread.

Here are some likely suspects....

http://www.doubleazone.com/goalposts.jpg