My car says I'm not using enough gas and it's getting a bit stale. So it has switched me to fuel maintenance mode where it runs a lot more on the gas engine to use up some of the fuel. Not that you can really tell from driving. It shuts off the engine at stops and when it's running I really don't notice. Just that I have the blue fuel indicator instead of the green battery indicator for range. So when I get the fuel down to below half, I can gas up and then it will go back to normal mode.
Since I have a car in the barn that needs fuel, I may cheat a bit and pump out some of the gas for the '55 Pontiac and then fuel up Voltie. We'll see.