i managed to round the bolt on my sump today. masivly annoying as its currently full of oil system cleanser and shouldnt realy be driven around but im going to have to get it sorted at a local garage or im car-less.
i know that you'r supposed to change them every time you do an oil-change but they are a bugger to get hold of and i'v changed the oil every 5kmiles without changing the bolt so its only realy my fault.
its just abit annoying that vaux cant make a bolt made of tougherstuff then that. or atleast make a sump that has a stick out bolt not a flush one so they are easy to change once the are rounded.