My wife and I never had to use the EMM on both our 2014 Volt and our 2016 Volt which we traded in our 2014 Volt for. Most of our trips, shopping in Portland Oregon, and fishing on the beautiful coastal rivers via Oregon Coast Highway 101, well exceed our electric range which is currently 65 miles or so. Personally I think its wise to at least every month drive just on gas for 10 miles or so or until the engine temp. is 200 F or so. Even from a cold start the 2016-17 Volt will consume only a quart of gas or even less, with current prices thats easily less the a buck.