If anyone wants to hear the end of my oil overfill saga (see earlier this thread), here goes: The oil level turned out to be 2cm, or 3/4, over the max mark on the dipstick - this in spite of a warning on the oil filler cap in vivid red letters that any overfill could damage the catalytic converter. I didn't want to drive the car back to the dealer who changed the oil for fear of doing more damage so on Saturday I went to the local hardware store, bought a piece of plastic tubing, stuck it down the dipstick hole and sucked the excess oil out. It didn't half taste funny. Anyway, it turned out there was just short of 1 litre of excess oil over the diesel engine's normal 4.5 litre capacity (including filter). So not only had they just chucked in the whole of the 5-litre can I gave them, but also left in 1/2 litre of the old oil. No wonder it was grimy. I phoned the AA's technical services and told them I'd done 5 miles in heavy urban traffic with the excess oil in. They said cats were much hardier than people gave them credit for and not to worry, it was highly unlikely any damage had been done. Then this morning I phoned Ford's technical services people on a premium