My 2006 saab 9-5 2.0t is using way too much fuel. Theres smoke coming out of the exhaust and on startup black liquid flying out of it as well. Im sure the oil and coolant hasnt been mixed. I also noticed that when idling the fuel consumption was slowly going up on the sid, it was at 21l/100km. Engine light is also on but i dont have a reader to check it at the moment but i might buy one. I disconnected the maf but that changed nothing. Anyone know what could be the issue or what i should check? Theres a slight hissing sound coming from near the fuel rail too but i couldn't find the exact point.