You can do some research of gasoline stabilization on the web.

My recollection is that temps above 80F greatly accelerate deterioration and crystalization. Chances are pretty good that Coleman fuel has a lot more stabilizers in it than pump gas which is what I was looking into when I did that research.

My first Peak 1 scared me too. I finally understood that the tank should not EVER be tip-top FULL and that using pre-heating paste for every startup led to predictable behavior and less time flaring off raw fuel while the generator warmed up. Carrying preheating paste adds a little weight but heck, it's a great fire starting aid even if the stove doesn't work!