Fuel quesstion for my 582

[Danzer1]

Mogas fuel stabilizers like Sta-Bil may work, but there hasn't been enough collective experience in my view to trust it in such an expensive, critical component.

IMHO, Sta-bil has been around for more than 50 years and works fine in all types of engines. Millions of gallons of history around for this product. What it doesn't do - it won't prevent fuel volitility from degrading over time (mogas or 100LL), so the longer any fuel is stored the less "ignitability" it will have.

Google "high octane gas" in your local area - you can usually find a few places around that will sell some without ethanol and let you pump some into cans - might be closer that the airport.