Marvel Mystery Oil

[Ed Luddy]

I use SeaFoam additive to the gas in my boat and my 79 Avanti as well as my 66 Parisienne. It seems to help smooth out  the idle noticeably. It's not cheap though and I only do so when I can feel a bit of rough idling. Anyone else try it?

[Guest LuxDriver]

I remember in former times mechanics used it to free up engines in cars that sat unused for a while.. to help free it up..or so I heard..

[Guest AlCapone]

I use SeaFoam additive to the gas in my boat and my 79 Avanti as well as my 66 Parisienne. It seems to help smooth out  the idle noticeably. It's not cheap though and I only do so when I can feel a bit of rough idling. Anyone else try it?

I use it in all my antique cars. I put one can in every tank of gasoline. Today it is 2 cans for $ 14 dollars at Meijers stores you never have to add gasoline stabilizer. I also put it in my mowers, chainsaw and weed whacker, Wayne

[cahartley]

I'm another SeaFoam user.

I use it in every fourth fill or so in my '59 Chev and '65 Mustang.

In the T's and '25 Dodge I add MMO.