Maintenance of Harvester gas engine range extender

[RMK!]

My understanding is that my Gen 1 Volt mostly uses the engine to drive the generator and only direct couples the engine to the drivetrain above 50mph, presumably for efficiency. If you need to pass it decouples and uses pure electric.

My original point was that the engine/generator is capable of fully operating the vehicle and not just some kind of "booster". You can run the car indefinitely on gas and have full power. Also, the car keeps track of the engine hours and alerts the driver when an oil change is required, not based on miles.

Yep, it was a "smart car" in that my wifes commute was less than 40 miles per day she was always on electric drive. One year she received a warning on the screen that the cars gasoline was nearly a year old and it automatically ran on gas only until that the tank was emptied of the old gas. She would plugin and charge every night and replenish the 40 miles of potential range via a standard 120V outlet. The Volts were beautifully engineered nice little vehicles which never made a profit for Chevy hence their demise.