For 15 years, Clark has talked about the advantage of keeping a new car for at least 10 years or buying a used car and keeping it for at least four years. Cars lose about half of their value during the first three years, but then the loss ratio drops off pretty steeply after that time. Consumer Reports has now done a study on the virtues of keeping a car for 15 years. Bear in mind that most owners only keep their vehicles for three or maybe five years. But by keeping a car for 15 years or 225,000 miles, you save $31,000 dollars. The report found that during the course of 15 years, your average maintenance will be $18,000 and your insurance will be $18,000.

Consumer Reports also identified 10 vehicles that are reliable enough to last 15 years -- and they’re all Japanese! Among the top ones are Honda’s Civic, CRV and Element; and Toyota’s Forerunner, Landcruiser and Highlander models. So what vehicles should you not buy? A lot of European models, according to Consumer Reports, such as the BMW 7 Series, the Infiniti QX 56 and select models of Jaguar, Mercedes, Volkswagen and Volvo. Meanwhile, how should you decide when it does not make sense to repair a car? Clark typically tells people the cutoff should be when the cost of repair is 50 percent or more of the car’s trade-in value. Now Consumer Reports says you can push that up to the actual trade-in value. Other times you should junk a car is when it’s rusted out; really unreliable, in a flood or in an awful accident.