If it’s something you are using regularly enough, you would likely hit a point of diminishing returns pretty quickly. I only bother emptying tanks if I know I’m not going to use the equipment for a while.

In theory yes, but you have to be pretty careful with that too. I work for a small engine repair shop, and we have stuff coming in all the time that people swear to God only ever runs ethanol free. Then when we test the gas, we find ethanol and water.

We talked to some gas truck drivers, and apparently there is a lot of cross contamination, so even if you’re pumping out of an ethanol free pump, you might still be getting ethanol. We’re telling people that it’s still best practice to empty your tank and run the engine dry if you’re not going to use the equipment for a while.