I retired in 2011 and purchased my 2009 2.0-litre diesel automatic Vauxhall Insignia Elite company car from my employer. It has now covered around 33,000 miles and is in need of new tyres (245/45 R18 96W). After making a few enquiries I was shocked to learn that new replacement tyres will cost around £250 each (£1000 for a set of four). I cannot understand why the price of these tyres is so high when a replacement tyre for an equivalent Ford Mondeo would cost around £120. I am concerned that in few years time the tyres will be more valuable than the car. I would be most grateful for any advice you may be able to offer to me.