My 63000 mile fsh focus 2.0 tdci suffered engine failure on the motorway after only covering 120 miles since it had a full service at an indepent garage. The car began to hesitate in low gears with clouds of black smoke, followed by loss of power on the motorway and a dreadful rattling from the engine.
After being towed home I checked the engine oil very black and the consistency of diesel. My suspicions are that the garage failed to change the engine oil after adding an oil flush.
However the garage are saying that it is the EGR valve at fault and that the oil is designed to be very thin. To their credit they have stripped and refitted the valve and changed the oil at no extra cost.
My main worry is a possible further fault or other damage, does anybody have experience or knowledge of the EGR valve and its sturdiness or lack of.
Any comments greatly appreciated.