My HC emissions have gone up in the last two years, from low single digits at 2011 MOT to about 160 at 2013 MOT. During this period I also noticed significant loss of oil (there are no leaks). I have been adding about a litre of oil every 1,500 miles, possibly more often than that. I am wondering whether this dramatic increase in HC emissions is a consequence of the engine burning oil, and whether I should expect further rise in HC emissions which might then lead to the car failing to pass MOT (max HC 200). CO emissions also seem to have gone up, currently at 0.18 natural, 0.14 fast with the maximum levels being 0.3 and 0.2 respectively. Not sure if CO emissions are in any way related to HC emissions. The car has done less than 60,000.

Many thanks for reading and taking time to respond.

Alex