Not for me - it's all or nothing. I won't even consider a semi-detached house. And don't even get me started on semi-nal fluids.
Well, for anyone interested Sportsbike shop have the best price I could find on Castrol Power 1 Racing 10W30 4 litres...£33.50 delivered. Should be with me tomorrow...
Changing oil every 1500-2000 miles on a new bike with low mileage I use semi-synth, I just make sure it is decent quality stuff.
I see what you're showing us @Selmer50mark . As others have suggested, I wonder if most dealers/techs now drop in 10 - 40 as a matter of course, regardless of model year and manual recommendation. Remember, they're probably buying it in 44 gallon drums. Besides, the 10 - 40 does seem to cater better to climate variation - not that we have a lot of it!!