One of the most technology dense cars on the planet is also the cheapest to maintain over 10 years. The Toyota Prius hybrid has been the most fuel-efficient car without a plug sold in North America, writes alternate-vehicle website Green Car Reports, but a new study finds it also relatively inexpensive to maintain. Your Mechanic, a website that arranges auto-repair house calls, recently reviewed maintenance-related expenses for its customers’ cars, finding the Prius to have the lowest average maintenance costs of any car over a 10-year period. The Prius averaged $4,300 in maintenance-related costs, beating out second-place Kia Soul by $300. Toyota had the lowest average maintenance costs across its entire lineup at $5,500.