I thinks it's good stuff. Delo uses Isosyn technology, which I think means heavily Hydrocracked, sort of a Group II+ base. A mate uses it in has 4-stroke dirt bike with a shared sump, which is hard on oil. It holds together well for him, better than some more expensive synthetics he has tried.
We also call it Caltex, but I believe it's called Chevron in North America.
Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154