Before all the boutique fuel requirements from the EPA and the push to put 10% ethanol in unleaded gas...Ammaco used to sell a premium unleaded that was known as White Gas. Before all the gas changes, I used to just buy that for my camping gear.
Now, you can find it in Wal-Mart and other stores as Coleman Lantern Fuel (also for use in any other unleaded gas camping equipment). Just look for the red and silver can.
I pay the premium price because I value my snowblower pretty much the same reason I run Mobil 1 in the ST. It's reliable.