castrol

Hi guys I have a FE 550 2007, the previous owner exclusively ran it on belray thumper 15-50W here in hot Australia. Will this Castrol Activ 4T be fine? Belray Thumper is ridiculously expensive at $25 a litre and I feel as though I need a little more than a litre as I change my oil filter...

anyone used? i had been using car oil after someone we all know said 'any good quality 10w40' semi synth is good enough pete'. no names mentioned dave (not 'taffy dave' by the way) he didnt specify it had to be bike oil, so, being a fan of castrol, i bought this stuff, only thing, its not as...