... parked in the garage, went past it a while later, see drips of oil

, what a bore. its trickling (only a few drops, but non the less , a few too many) running down from above the oil sender unit, so its not that, I recon its one of those seals that `seals` the push rod tubes in the block/head, and as its a case of removing the `stat` cowling I shall not know until I have done so, then its a head off job, me thinks. Mike.