Good quality, great product, use it always on both my bikes.

I usually use castrol power 1 in my Yamaha, but my new Honda was was about half way through its service interval and the oil was visibly dirty and in need of a change. My Yamaha used 10w40 and Honda specifically outline using a 10w30. My local super cheap did not stock 10w30 Castrol Power 1 so I decided to give Penrite a go, I was pleasantly surprised with the built in funnel which made filling up the oil a breeze. The high zinc formula gives me piece of mind as my type of engine has suffered with premature cam chain guide wear so reducing friction even by a tiny amount is a good thing. I would definitely be happy to use this oil again. It was $40 cheaper than the Castrol as a bonus.

Convenient size 1 litre and competitively priced. Suitable for several of my needs.