Completely agree with the above! Don't let the bike magazines or oil company ads influence you. We're not running MotoGP or WSB engines so just because they use a particluar brand doesn't mean a thing. Just use a good quality oil that meets the spec. for your bike and change it at the recommended intervals and everything will be OK. The only exceptions that come to mind are if doing very short journeys regularly e.g. a 5 mile commute then it would be good to change it more often, say 2,000 miles as the engine won't get hot enough to burn off some of the combustion products that can be quite corrosive on internal engine components and the other which has already been mentioned if planning an extra long journey. I personally refuse to pay the premiums for so called bike specific oils and have been using car oils for more years than I care to remember and never had any problems.