I was told by someone who owned a Volt, he was directed not to fill up the tank of the Volt unless he KNEW that he was going to drive far enough in the next 2 weeks to use up all the gas. Otherwise the gas could go bad in the tank since you were driving mostly on electric. Did they something similar to you? I wondered if the Pacifica Hybrid ran into a similar issue.There she is...wife could not be happier. Charged overnight and she ran a few errands in full electric mode no problem...we noted the odometer and date yesterday as I topped her off...will be interesting to see how long until next fill up.