It says on the can ad 1 oz per gallon .People here seem to reccomend 1 oz per tankful which is less than 1/2 that .Can adding to much seafom to your gas cause a problem ? How often should you add it? Also ,is it a good idea to add marvel mystery oil to the gas once in a while ,and how much? Thanks

rl153 wrote on 06/10/10 at 15:06:47:

If its the first time put 2 in after that 1 should do,,sea foam has oil in it.I put it in about every 2 months.

Charon when is the last time you tried Sea Foam

Charon you think your bike runs fine,Put some Sea Foam in it and you will see what running fine is like.

Sea Foam isn't a fuel thats going to give you more horsepower,Its going to get your jets clean and keep your carb slide running smooth,so it reacts quicker.So you will always be getting max horsepower out of it at any speed.

Mark Twain said it best - "Faith is believin' somethin' you know ain't so." There are a lot of people with a lot of faith in Seafoam. As far as I know, no one has actually devised a test proving whether it does or does not work when added to fuel. That specifically includes its manufacturer. Seafoam's website says it slowly and gently cleans fuel system parts and intake valves. But that is just what the Federally mandated detergent package in gasoline is supposed to do, so one cannot isolate the effect of Seafoam from the effect of the detergent in the fuel. The Department of Defense pamphlet I found earlier says the military will approve fuel additives only if the manufacturer provides testing showing results of fuel with and fuel without the additive. The tests have to be repeatable, because a one-time test may be a fluke. It appears none of the additive makers have troubled themselves to do so, and with a fuel market as large as DoD they would sell a lot of additive - if the additives could be proven to  work.

Charon, you have made several valid points & I agree there's no magic fix in a bottle... Period.

Adding Seafoam to a perfectly fine engine will not produce more power. It's not gonna fix a burnt valve or a spun bearing either. It may clean and lubricate some, but is that really necessary? Maybe not, but a lot of folks believe in it.

Adding Seafoam is basically multiplying the amount of detergent that's already in gasoline. No, it's not a fix-all, but I can see where it may have a place when reviving an older engine. Weracerc took advantage of the extra detergent by cleaning out a neglected carb. Much like soaking it in solvent, only the lazy man's way (no offense Wera... it worked!).

I like the fact that you backed up your decision to not use Seafoam with data from the DoD, even if the DoD isn't always known for making the best decisions. Having said that, I wanna share that my father was a mechanic in the army in the 60's & continued as a mechanic until he died 8 years ago. Although it was not "official army procedure" to use additives, he occasionally would dump a cheap bottle of isopropyl alcohol ($.99 rubbing alcohol) into a fuel tank to help clean a neglected carb or injectors. Alcohol also attracts water, so it will help dry out any moisture from condensation or bad gas. An old trick he said he learned in the army. So I dunno, that was an opinion based on 40 some-odd years of experience.

I say... If you like it, use it. If not, don't...

Bill, did you read the whole post this time? Or was it too long for you again??

Try adding something constructive to a post every now and then. Back it up with real life experiences, or hard data.

I didn't state anyone had ever claimed it produced more power, did I?

You did say it will ensure "you will always be getting max horsepower out of it at any speed".
Now see, I find that claim very interesting... Would you like to share your dyno sheets, or how about a reply of more than 2 sentences of bullsh!t??? Something with some substance this time, please... We already know your opinion.