My current gas expenses for my company run at about $800 a month. This is for 1 car and 1 commercial truck. The car is used by my salesman and the truck by me. What I've been thinking of late is to trade in/sell the car ('95 Lincoln Town Car) and purchasing an Insight. The Lincoln does about 20mpg avg. these days. Honda says the Insight with A/C and that CVT transmission does ~55ish. I figure since the gas expenses for the Lincoln alone is ~$400/month I'd save a little more than $200/month switching to a high mileage car. Would the $200 saving cover the monthly payment for the Insight? Is this even a worthwhile idea?