[pdxandi]

How do you know when to change the oil on a car like this? Is there a separate odometer that keeps track of how many miles are on the ICE? It seems possible you may never use the ICE, at least in our case, so how do you know how to maintain it?

[compsciphd]

The chevy volt would run the engine on occasion to make sure oil was moving and wouldn't let the average age of gas in the tank exceed a year (if it did, it would go on a gas only mode, even if full charged until you refilled it to get the average age under a year).

[Retric]

The car keeps track of oil changes for you. My non hybrid car also tracks things like tire rotations and filter changes. It’s a little conservative but that’s fine IMO.