Fully synthetic or part synthetic?

[PaulSmith]

Remind me never to buy a bike from you  :eek

Care to share your reasons?

You are someone who (I believe) changes their oil a) themselves, and b) at service intervals or more frequently. Yes?
Do you look at the condition of the oil coming out? Not its colour, its condition. Do you look at the state of the filter? If, based on what you have found in the oil, you think your Fazer needs fully-synth, then I hope you wont mind if I decline your kind offer to sell me your otherwise excellent bike. If you choose to use fully-synth, for piece of mind or  as a way of 'indulging' your bike then, as I said before, it is your bike and your choice.