Ethanol-free with stabilizer wins winter storage.

Yes, ethanol-free gas with stabilizer will last longer than treated E10, because the stabilizer handles the gasoline and the ethanol is a separate problem the stabilizer can’t fix.

E10’s real winter problem is water. Ethanol loves water, and over months in a partly full tank or can, it pulls moisture out of the air. Eventually the water and ethanol separate from the gasoline and settle at the bottom. That layer is corrosive and can wreck a carburetor or fuel system. A fuel stabilizer doesn’t stop that. It only slows the gasoline itself from oxidizing and turning to gum.

Ethanol-free gas skips all that. Even plain ethanol-free gas stores reasonably well for a season. Add a stabilizer and you’re protecting it from oxidation too. So you get the best of both: no water absorption, no separation, no phase separation puddle at the bottom of your tank.

If you’re stuck with E10, fill the tank to limit air space, add stabilizer, and run the engine long enough to get treated fuel through the system. That helps. But the honest answer is that “treated E10” is still E10, and winter is exactly when ethanol bites you.

Future You will be happy to see clean fuel lines in the spring.