I use the Seafoam, and it's good stuff...but it's not a miracle in a can...It's light, aromatic hydrocarbons that can dislodge "gunk"...and it's a good fuel stabilizer..but it will not cure mechanical problems....My apologies, but I just won't drink the kool-aid..
I have never used any additives in my fuel - ever. I have had no problems and I'm at 120,000 miles. (knock on wood) I use low octane regular and will use higher octane if I'm carring a load, wife and overnight items.
Nothing. I do not like the thought of using anyadditives in my engines, transmissions, fuel system, or hydraulic components unless it is already in the container.
I have already rebuilt the carbs, replaced my fuel tank, and replaced filters/screens, so I would like to think my system is clean. Also, it is warm enough here tokeepmy bike running to prevent thegas from stagnating.
On all my other engines, if I suspect a fuel problem, it is easy enough to take the carb apart, check the bowl, or give it a shot of carb cleaner. 1-5minutes and it's apart and I know the condition.
If I were to develop a problem on the wing, Iprobably would useseafoamsincethe carbs can not be readily taken apart. But, Iwould not use it religiously. If you do, it is either a waste ormasking a true carb problem that requires true maintenance, IMO. Some may call it PM.
What fuel additives are approved to beused with AVGAS? And, how often is an airplane recip carb to be taken apart for regular scheduled maintenance?
Irecently ran 4 oz of Seafoam in my crankcase & rode for about an hour before doing the winter oil change. Put another 4 oz to preserve my fuel & to clean out the fuel system on days when the snow thaws.
Next oil change will be 90 days from last one regardless of mileage. The Seafoam in oil & fuel at the next 90 day interval.
Same in my SUV, old Shadow, & lawn tractor. The old F-150 gets an annual oil change.