Not really feasible in California. Service stations here can only sell the approved CA blend. And the referenced web site mentions about a dozen specialty shops in the whole state.
I've been off work, so after the first charge I've driven around town for 2 days on EV only, so I guess I can see the allure now...
My Black & Decker electric lawn mower used to last fine over the winter. It started right up when plugged in come spring. I now have a lawn service so sold that mower.