get a used prius, and convert it to a plug in for 103 mpg, if you have kids teach them how to drive with it.
1) If you get a Prius and teach you kids to drive using a Prius, then when they get in a different car, they really do not like "Neanderthal Cars".... Starting a conventional car is hard and sometime makes this HORRIFYING grinding sound.... It shakes and makes a lot of noise while stopped.... Where is the gas mileage gauge???... Why do I have to go to the gas station so often???... $70 dollars to fill up (that cost more than my cell phone bill !!!!!) .... What's that smell??? (It's called exhaust). "Someone told me if you turn on (note this terminology) a car in a closed garage it can kill you" (That is true, but it may take a real long time with a Prius.) The best of all is comparing how much MPG you get instead of how fast you get somewhere for bragging rights. (i.e. My son gets better MPG than me?!!!!) I bet most buyers do not think about this "hybrid" effect.
2) Paying less at the pump is easy to accept, but stopping at the gas station twice as many times when reverting to using a non-hybrid is a BIG pain. (The heck with the incessant comparisions between hybrid total cost vs. convention car total cost, the long gaps between fill ups counts for a LOT.)