That just changed it to 19.5:49.5... That should keep the thread going for a few more day...
RE: "you will probably find the reason they chop and change on oil recomendation is which ever oil company gives them the biggest backhander"
I think I remember 11's were recommended for 20:50 for the 1st 20k miles. Then the 1150's had special "running in oil" which was changed to 10:40 at 600 mile service. Now we are back to 20:50. Also the number of folk that could "tell" the extra smoothness/"power release" with their super spec oils
I could never get a staight answer out of my parts guy on why the dealers GPS was twice the price of the Halfords across the road

Hence now i do as much of my own work as possible
Tip... You used to be able to buy your own oil and take it in... and save about £20. I don't think they charged "corkage"...