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Hi guys this issue has been niggling at me for some time now, mainly because I can't do a simple motorway journey without needing to stock up on new bottles engine oil!

My car is a 1.0 Corsa C Ecotec (2001) and I have noticed ridiculous oil consumption, I am talking 3 litres every 450-550 miles! City driving the car lasts alot longer on oil but one simple motorway journey will literally eat most of the oil up and it will go from almost full dipstick reading, to running dry within a week of the journey (last one was around 50 miles each way so hardly a strain!)

I have inspected the engine and there are no apparent leaks, also left the car running for around 25 mins on the driveway and laid newspaper down, still no signs of any leaks!

I do understand these engine burn oil alot and i did buy some additive (Wynns stop smoke oil treatment) on last oil fill which did seem to help slow down the rate of oil loss.

I have done some research on possible faults, piston rings, valve stems, blocked breather pipes, the car does not smoke at all (white or blue) and coolant levels remain more or less unchanged.

Power wise, the car still picks up quite well and idles just under 1k revs.

I am getting these engine codes:
P0300
P0303
P1616
P0170

The misfire codes are strange because I did replace the sparks and coil pack a few months ago and the code disappeared but somehow reappeared?

If anyone has any suggestions they will be welcomed!!
 
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