Chevron Techron Conc. is perfect for everything from the fuel tank to the top of the pistons, does nothing for ring groove buildup, ring jacking, common in 2 strokes.
peels the tough carbon deposits off the ports. perfect in the DFI engine injectors. works wonders on varnished up neglected carbs
Chevron only recommends occasional maintenance use, not daily. 2 stroke, 1 large bottle per 10 gal every 50 hours.
acetone+toluene+naphtha Coleman fuel+2 stroke oil mix works well in a soak for the ring jacking, Ring Free works well also but is super expensive.
a spray soak thru the reeds should only be done once or twice a season depending on hours and run type. be sure to add the extra 2 stroke oil to the cleaning mix to prevent cyl. scoring from oil wash down.
i use regular straight 2 stroke oil for my end of season fog oil. has lots of anti corrosives, metal adhesion and water protection products in it.
works well in 4 strokes also for end of season over winter protection in a setting engine