I use in for small engines and vehicles as a gasoline additive. Seems to work.
Works but dont forget to slap yourself and check the headlight fluid, make sure you windows have plenty of elbow grease, sparkplug batteries are charged, and the flux capaciter is fluxing.
Seafoam helps my snow blower engine run better. It is 4 cycle Sears and it has a crap Chinese engine on it. When Tecumseh went under, Sears and some other big box stores turned to a Chinese co. to make small engines. The carbs on these darn engines are no good and run rough and never seem to reach max power. Seafoam helps but is no full cure. I would have returned it, but the problem seems to get your attention just after the 1 yr. warranty expires. Replacement carbs are no better.