I believe the gas tank is pressurized. Nothing like a lawnmower subject to evaporation.
The issue isn't evaporation. The issue is gas going bad. I know with lawnmowers, it is recommended to drain you tank for the winter or use a gas treatment like sta-bil . Otherwise, idle jets may become clogged.
"About 3-5 months depending on where it's kept. If you add a fuel stabilizer it'll last 6-8 months. You only have to add a small amount, and it's sold in small bottles at convenience stores, auto stores, etc."
2018 Niro PHEV LX Silver/charcoal
Last edited by charlesH; 06-30-2018 at 05:39 PM.