[AngieH]

I have a 2018 Plug In Hybrid. I recently got an oil change. I have about 18,000 miles. Ever since the oil change, it keeps dropping out of EV mode for no apparent reason and running the engine. At first I thought maybe it needs to do that to run the new oil through or something, but it's been over a week. I am unable to work from home right now and I do have a short commute to work which I'm usually able to do on all electric. I called to schedule an appointment with maintenance and it stopped doing it, but then it started again. Any ideas/comments before i take it in?

 

[JimWoo]

I just saw this post and is now almost two since you posted, I was wondering if you ever determined the cause of the problem?

 

[obermd]

I also just saw this. I wonder how old the gasoline in the tank was? I know the Volt has a fuel maintenance mode where it will burn the gas when it reaches a year old. Looking at the dates and miles on OP's post I wonder if her Clarity was doing the same thing.