yes 100%v you can add too much and it will cause poor or NO running at all issue's
going a LITTLE past the recommended amount is OK< but I would NOT go a lot past that

personally if it was me, and parking for MOST of the winter I would DRAIN the current fuel out of tank
and replace with NON ethanol TREATED fuel
ethanol is BAD fuel period, and the longer it sits , treated or not, it still does damage and can go bad!

 

My snow machine and motorcycle are put away with fuel stablizer and regular gas. I I have never had an issue. Last year, I used it enough to go through enough gas that it wasn't an issue in the winter. I doubt I will use that much gas this winter.

 

I agree with dry storage, but since using stabilizer, have gotten away from it. Dry stored carbs can have the float stick.


Ethanol storage without stabilizer is asking for trouble. I got attacked by the corn lobby for trashing ethanol.


My 2-cycle boat engines were the worst, stored from Oct-June, stabilizer made problems go away.


Seafoam - 1oz per gallon, gives trouble-free storage and a clean fuel system. No popcorn in the jets! Marine Stabil is good for storage too, but I keep seafoam around for use during the riding seasons to keep the corn at bay. If I skip that, I get to pull the carbs and clean out the popcorn. Carb removal is a real pain on the street bike.

 

you can also add TOO Much sea foam in a tank and run into fuel issue's, so, only add enough not too much!

 

Seafoam is also a stabilizer.