hey guys i know this is an ageless debate but thought i would seek input on this particular viscosity, so ive done some reading and research on here plus my personal experience mixed with the temperature down here and decided to stick with penrite oils being my favourite and purchased then Sin 15w-50w and was told by my older bro being a mechanic it was too thick and suggested i went with a 5w-30w. im happy with what i got but would still like some second opinions as i know theres alot of mechanics/experienced people on here.

cheers in advance
rob