I don't own a Range Rover vogue but have a Discovery(petrol) and a friend who owns a 2006 Supercharged Vogue. Frontier are not exactly the cheapest people when it comes to maintenance. Parts are quite expensive and sometimes take a few weeks since it has to be brought down from London. They are not very well stocked. A basic service for the Discovery costs between 35,000 - 40,000 so I suppose the Vogue will be around that price. According to my friend the electronics and the air suspension are the things that give them the most amount of trouble. The parts are not what I would call cheap when it comes to replacing as well. According to my friend they average about 3kmpl in Colombo and roughly about 6-7 out of Colombo depending on how you drive.