Here's a good problem to have: I've had my PHEV for a month, driven almost 1000 miles, and I still have nearly the original full tank of gas. Should I worry about the gas getting "old" in the tank? Perhaps I should add a fuel stabilizer?
Good question. I'm in the same situation.
I know it's recommended to not store gas through the winter in a lawnmower. So maybe one should burn gas after a few months.
2018 Niro PHEV LX Silver/charcoal