Engine Performance problem
2007 Vauxhall Zafira 4 cyl Manual 60000 miles
Burning at least 1 ltr oil per week. No sign of leaks or smoke. When u unscrew the oil cap you can feel the air getting sucked `into` the engine. Seems to lose a bit of power (sometimes). Diagnostics prompted mechanics to change the coil pac but is still burning over a litre a week of oil, and lots of petrol. Coil pac did make a difference to the missfiring but thats slowly coming back.