Q. I’ve driven my Audi TTS only 1,800 miles in 18 months but the service light has appeared. Do I need an oil service or can I go on a bit longer, given my mileage? SP, Welwyn Garden City, Hertfordshire   A. You should change your oil once a year, especially if you’re doing such … Continue reading Car Clinic: Does my car need its scheduled service if I’ve not put many miles on it?