I am a carer so I do alot of short distant driving from door to door and, some of the time, the car doesn't get a chance to warm up.
I mostly drive on 30-40mph roads and I been told that this driving habit doesn't "burn/breakdown gunk/build up"
Should it be advised that I take my car on the motorway once a week to burn any build up and would I need to change my oil more than the recommended intervals?
(My car is a Ford KA 1.2 Zetec 10plate. Currently has 19k on the clock)