update number 2.....
Had time yesterday afternoon to drop sump oil (god it's nasty stuff, haha). Refilled as per procedure. Drove around block, dumped sump oil again, still lovely and dirty as suspected. Refilled again and drove again. Worse than before now, as little drive in D. But bizarrely I swear R is making more of an effort, especially in Low mode.
Ran out of time then. Waiting on a bottle of Liquid Moly cleaner to arrive. Then will add that and run for 10mins as prescibed. Dump oil, change filter, and refill. Will then drive it a while, do final dump and refill including bottle of Lucas..and keep fingers crossed....
watch this space.....haha.