Right my first post on this forum so please forget the bad spelling mistakes I do hah!
My car is a 2003 Ford Focus 1.6 Zetec SE done about 75,000miles.
Im a 17 year old apprentice mechanic, and this is my first car. I bought the car back in March this year and when I first tried it I was misfiring like a Bi*ch but a new coil pack and spark plugs sorted this problem. Anyway I noticed after few months driving my car I noticed its fuel economy was awful averaging about 26.5 mpg!! So I gave it a service about month and half ago. The fuel and oil filer was changed (didn't change the air filter because I just fitted a Cone air filter on it). I knew with the Zetec's that it had to have a special kind of oil so I put the specific oil in it. Now the problem-I looked the oil level on a dipstick 2 weeks ago and I noticed I was below low so I added about 1/4 litre of oil into it. So I checked again last Saturday (30/11/2013) on the dipstick and it was on low AGAIN! And I've only done about 100 miles. Also I changed my spark plugs again that day and they were black and oily. I've asked my lecturer in collage what he that was the problem, so he started my car and listened as I said I wasn't running 100%,with one cylinder sounding dodgy was his opinion. And also he noticed there was a lot off soot on my twin bore exhaust. So his thoughts was that the car was running rich(which would answer the poor fuel economy and burning oil). And the car is going good aswell! So what could be the problem?
Thanks in advance gentleman!