Yaaay! Oil again!
I bought a tanker load when HG were selling the stuff for £10/4litres.
It's supposed to be Motul semi.
I thought that the Silkolene semi made the engine sound and feel smoother and the gear change smoother too but if it's the right spec, there you go..
Look out for oil/filter deals on t'internet.
(I change about 3 times a year too on 4000 mile intervals.)