Kerosene Seafoam

If you are supposed to change the oil after you add seafoam, then by putting it in the gas tank at the same time you end up putting seafoam back into the engine. That can't be good.

 

The seafoam will burn off with the gas.

 

Using in the fuel cleans the top end of your motor by dissolving gums, varnish, and getting rid of any moisture from condensation. Because it's in with the gas, it burns off along with all the crap it cleaned out. Every spring half a can goes into my bike, been doing it for years with my vehicles.