The very last thing I do is go to a fuel station that carries high octane ethanol free fuel and fill it up. Then fuel stabilizer then run a few miles for it to get distributed throughout the fuel system.
Fuel with ethanol has a short shelf life on the order of 4-6 weeks. Ethanol free fuel can go up to about 6 months with a stabilizer added to help out.
This comes from painful experience. The only way humans seem to learn anything!
