There are so many factors to consider when deciding whether to buy a 3 year old car with 60,000 (I don’t consider that high mileage – BTW) miles on the clock or one with 15,000 miles. For a start service history and condition are far more important than a number on the dash. IMO over a 3-5 year period motability tries to skimp on a lot of maintenance issues between customer and dealers anyway. Mileage has no indication as to how good the car will be. It doesn’t tell you if it has been regularly revved high from cold, banging over potholes and ‘sleeping policemen’ etc or a garaged car that came out once a month for a good long trip. Mileage only matters when it affects the ability to buy a warranty. Short journeys in the old days only mattered because of fat carbs and petrol washing down the bores but modern injection really only delivers enough fuel to burn efficiently otherwise it would wreck the cat. Common sense tells us to drive under a certain rpm until the car is warm but most cars are warm within a few miles so seriously, what difference is there going to be. Low mileage does not mean it is a better car any more than it means a high milage car is going to be more reliable. Of course – that is part of the gamble you take buying a second hand car, you simply don’t know.