Donate it to a science project.
mix in a couple gallons of it to a full tank of fresh gas and use it over time in something other than the sled.
like already said 100 gallons is far too much to throw away, and 7 years is a long time.
just wondering why has it been sitting around that long??
'92 Indy 650
'95 Indy XLT 600, plastic skis, skid plate, cobra windshield, XTRA 10, full Fox package, 1" riser