are we talking race fuel or pump gas??...if we are talking about pump gas? not that big of a deal...

bruce is the drum sealed good in a cool place?....if so chances are yes.

i would never add stabilizer to race fuel.

first thing to go in fuel is the lite ends...look at the reid vapor pressure numbers and distillation #'s/percentages.

So if I have a little 87... (10 gallons) and I want to dump it in the boat... can I follow with about ten gallons of 92 and make more or less 89 out of it??

I have half a tank and want to go out this weekend. Don't feel like driving to find a gas dock.

yes, octane works that way... (if you used exact amounts you would have 89.5... )

I've always used the estimate that I lose 1 octane per month. So after 5 months if I started with 92 I assume I have 87. It may not be that bad but it motivates me to manage my fuel quality.