2008 ford fusion burnt 4 litres of oil in a month, has a loud tick tick tick, when I stop but am in gear I've got a rough idle that toggles back and forth between 300-900 Rpms at 300 it starts to choke, I ran it dry of oil 4500 Kms After I bought from dealership I checked and it was non-existent, since then it's had a loud tick tick tick whenever I accelerate or start rolling again after I've stopped