I picked up some Gulf Western 10W30 semi-synthetic (API SP and ILSAC GF-6A) at 70% Off, $10 for 5L
That is an amazing good price for Australia at $2 per litre, and you have the natural advantages of 10W30 such as its low Noack volatility and its shear stability, coupled with the new tests added to SP & GF-6A, like timing chain wear protection and LSPI protection.
Gulf Western isn’t a brand I usually pay attention to, but I’ve looked them up and yes they are on the official API list. So I'm now keen to give this oil a run.