the red stabil is useless on ethanol fuel... the blue MARINE stabil is formulated for stabilizing ethanol fuels and is also more concentrated, so the same size bottle goes farther than the red stuff does..
not all states/area have this option, but when laying up the RV for winter, filling the tank with ethanol free fuel has benefits that far outweigh the extra cost.... and a bit of seafoam added to the ethanol free fuel will stabilize it and will also dissolve any gum and varnish that has built up from running the ethanol fuel during the rest of the year...
