Well, at $3600/year in fuel costs, it would be cheaper to buy and insure a new Yaris iA or an off-lease Prius 1 for the exclusive purpose of driving to work. Let’s say that 12,000/15,000 miles are for annual commuting, and you only drove the Suburban for 3,000 miles/year, at 12.5 MPG and $2.40/gallon a brand new Yaris…