Your not going to get away from ethanol, refineries are putting it in, and thus every gas station has it in it. I would suggest adding sea foam every time you fuel up. that is what I'm doing. It does suck, I have to fill my boat with 55 gals of fuel every fall to store it over the winter, to keep condensation out of the tank. sea foam claims to remove water and deal with the ethanol.
I don't know about though two sites. I know maverck buys the cheapest gas out there. they buy from any and all refineries that sell to them at a lower price. I would suggest sinclair, they produce from local oil.
1.Old petroleum residue (gum and varnish) buildup. All fuels and engine oils leave behind residue deposits that accumulate over time. In the crank case, this residue builds up around lifters and rings, preventing them from functioning properly. In the fuel system, residue builds up in the injectors or carburetor jets, on the tops of pistons and on the backs of intake valves. Carbon in the exhaust adheres to this residue and forms carbon deposits. THERE IS NO DIFFERENCE BETWEEN THE RESIDUE IN YOUR CRANK CASE AND THE RESIDUE IN YOUR FUEL SYSTEM. IT IS ALL PETROLEUM VARNISH. Sea Foam slowly and safely re-liquefies this varnish so contaminants and carbon deposits can be safely cleaned out of the systems as the engine is operated.
2.Lack of lubrication. This can occur in the fuel system as the result of dry fuel additives such as ethanol that actually remove lubrication from the engine components. In the crank case, varnish buildup around the lifters and rings can prevent the oil from properly circulating and lubricating. Sea Foam contains a high-temperature penetrating, lubricating and cleaning oil that will not evaporate even in high heat areas like the combustion chamber. It is also able to safely dissolve varnish from lifters and rings so the oil can flow and lubricate properly.
3.Moisture. Fuel can absorb moisture from the atmosphere - even more so with the addition of ethanol. Crank case oil can also become easily contaminated with moisture. Sea Foam fully encapsulates the water molecules in the fuel and oil to prevent phase separation - rendering the absorbed moisture harmless.