Fenners
Supercharged
Guys who knows way more than me would say use Mobil oil fully synthetic.
I would say just get louder pipes.
Nice answer phar2slo



There is a new thread going talking about Oil that makes interesting reading and discusses the merits of Synthetic oils, however this could still only hide the issue.
As stated by Tal and others it would help if we could locate where and when you get the whine, acceleration/deceleration, low revs/high revs, high load up hill/low load down hill, all gears or a specific gear, you get the picture
I am a new owner and therefore not the best person to answer your question but I do have an inquiring mind, sorry