Sorry, my bad, I thought you meant the drain plug during a filter change ...I was referring to the oil filter, once loose it spun off ok so the threads were ok. The new one went on fine too, thankfully.
Yes, that was the conclusion I came to, between the name calling and swearing. Film of oil is a pretty basic thing for a mechanic to know so it may have been a case of not bothering or not caring. Was at a Vauxhall main dealer for the previous service.Sorry, my bad, I thought you meant the drain plug during a filter change ...
They might have fitted it dry, so there was no oil film between the seal and the block, that's (one reason) for worth while smearing a film of oil over an oil filter seal.