Just ordered 20 litres of this as it seems like a bargain compared to other makes.
http://www.liqui-moly.com/liquimoly/produktdb.nsf/id/en_1527.html?Opendocument&land=GB
They look like a switched on company with a very good search facility to find the correct oils for your particular bike.
It cost me £119 for 20 litres, including delivery, but it looks like I may have got the only one…for now at least.
I was a bit shocked to see the price of this 10w-60 oil generally.