People say that Bs leak oil - 'marking their territory', 'if it doesn't leak, it's empty' or 'self lubricating' - but mine had gone from the odd drop under the sump to a decent patch under the manifold. A cast around served up the main suspect of the tappet chest covers.

When the car's hot and is running at low revs there's a grinding noise which runs in time to the oil pressure needle bounce. I reckon this is either the oil pump or the oil pressure relief valve.