As per the title i changed the oil and filter on Saturday morning.
After the new oil went in and the old black mess came out, i poured this into the new oil bottle and it only showed 3 litres 🙁
I've been topping up on fortnightly basis but i musn't have been topping up enough.
Whilst i was at it i cleaned the throttle body which wasn't too bad and the inner edge of the intake manifold which was a bit clogged up.
The car now runs smooth as you like 😃