I've done some basic MOT tests (its due on the 11th of June) and when doing the emissions test at 2500rpm massive clouds of blue smoke where coming out the back. The car is burning oil quite badly. This was the only major thing I could find though I have not been able to carry out the steering test. How much is it going to cost to replace the piston rings and stem seals roughly if the labour is £30 an hour? Also if I am going to get that done is it worth getting my warn out camshaft replaced? The car itself as been very very reliable in the past 1300 miles, its started first time, never stalled, always engaged gear first time etc.