Premium Fuel?

Even if you do have to use 91, you will still save a lot of money in the long run. Don't those things go something like 50 miles on electric before they switch over to gas, and then get 45 MPG once it switches to gas? If so, you're still saving A LOT of gas money, even with premium.

I have one of the first gen Honda Insights and get 60 MPG average out of it. It does not require premium, so I spend about $40 every 2 weeks on gas with a 25 mile commute each way. When I drive my truck, I spend almost that in Diesel on a round trip to the track that's about 35 miles away (towing the Duster), about 13-15 MPG not towing.