crapinal is a big problem! for one it absorbs two much water which it attracks,oil and water dont mix,oil is the life blood of a two stroke,crapinal is also a solvent which starts to break down the oil ,and in older sleds there are deposits in there fuel system ,tank,carbs,lines,fuelpump,from normal fuel it loosens those deposits and plugs jets and needles while your rideing ,once you totally clean with a good solvent and replace those parts you will eliminant that problem but as for the water problem there is no fix, water seperators are not a fix if water is there fuel is junk you will burn up your motor the only thing you can do is make sure you use up all your fuel dont leave anything sit with crapinal in the tank it degrades and seperates to fast put a fuel valve in line so you can run fuel out of carbs which will also give a little more oil to motor to help protect against oxidation on internals while it sits dont drive sled and then pull in heated storage that only helps the crapinal get more water, a vent valve would help to along with fuel valve for off time just had a customer whose fuel went bad in a weekend fresh on fri bad on mon, probably came from station almost saturated, was phaze seperated on mon you cannot see phaze seperation looking down in tank very easy