Is SeaFoam in the gas worth it, or is it a waste?

Seafoam won’t do anything and you won’t notice a difference if you don’t have a problem.

If you do have a problem it works great. I used it in a four stroke outboard that was not used for 5 years. put fresh gas in it and tried running it and it just wows running real rough even after running a couple of gallons of gas through, put sea foam in it and after several minutes it smooth right out.

I put it in a carb fuel bowl and watched the crud melt right off.

I use it in all my OPE when storing and through the first tank for the season and always with Top Tier.

But I do like the smell of MMO, and use that more as a cutting fluid and for cleaning up tools.
 
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