Join Date: Jun 2018
Location: Northern Ontario Canada
First off your engine simply isn't high performance enough to require 91 octane nor warent the extra cost. Second as much as ethanol isn't good, as long as you regularly use your Atv and don't let it sit around for many months you ll be fine.
That said, if you rarely used your Atv or were storing it for many months, I would certainly recommend filling it with 91 octane and / or some fuel stabilizer.
2009 Grizzly 550 Special Edition, Red Midnight Armour, EPS, 26"Pitbull Growler BG2.5 xor, on 12"polished alloy SE wheels with 1"spacers, Yamaha overfenders & windshield, Heat Demon grips & thumb warmers, 2500lbs Warn winch, two up seat / storage box, Moose rear bumper, Gold Plugs in diffs & engine, COOP45 machined sheave + 0.5mm shim (3.1:1), 18 gram weights, EPI Orange spring
Last edited by Vincent; 04-15-2019 at 11:06 PM.