Just ordered some engine and gear oils for the bike from these guys. They've got a discount on till the 24th of this month, so get shopping if you need some. Use coupon code WAREHOUSE.
I use Opie for all my oils on both of my bike's - they are always having deals of one sort or another and I take advantage of these. Its worth signing up to their e-newsletter as this tells you when they're discounting and/or giving free shipping.