Small engines have small, poorly sealed fuel systems with small carburetors that plug up easily. I would stick to a fuel additive that focuses on fuel stabilization, fuel system cleaning along with moisture, ethanol, and octane management. Upper cylinder lubrication is great but less important, IMO.
I have been on a serious fuel additive testing binge lately and my favorite gas additive by far now is K100MG. Napa carries it and of course it can be ordered online if need be. It is a solvent based additive that cleans, manages moisture, stabilizes fuel, lubricates and raises octane by 2 points. The company that makes K100 does almost zero advertising, that is probably why you have never heard of it. For something that is more common and easier to find, Gumout multi-system tune up works well.
I have been on a serious fuel additive testing binge lately and my favorite gas additive by far now is K100MG. Napa carries it and of course it can be ordered online if need be. It is a solvent based additive that cleans, manages moisture, stabilizes fuel, lubricates and raises octane by 2 points. The company that makes K100 does almost zero advertising, that is probably why you have never heard of it. For something that is more common and easier to find, Gumout multi-system tune up works well.