In the 4+ years I've owned mine (Micro4K) prior to filling the fuel tank for storage I dump in a big bottle (treats 80gls) of Sta-bil fuel stabilizer then fill the RV tank full 60 gallons. Then I fire up the generator and let it run ~ 30 mins or with a load.
Shut off. And store RV for ~7-8 months.
Pull RV out check everything over. Fire the generator up. Bingo we have lift off