I was checking Costco coupons today and found Nulon Full Synthetic was cheaper than Supercheap Auto. Super cheap price is $55.99
http://www.supercheapauto.com.au/online-store/products/Nulon…
Features & Benefits
5 Litre
10W-40
API SN/CF, ACEA A3/B4
Full synthetic formulation
Added Molybdenum Dithiocarbamate provides more protection and performance over engine oil alone
Helps reduce metal to metal contact
That's cheap. The best price I've found in the past was $39.95 at Auto One a few months ago, and even that price was unheard of.
I should go and buy 20 of these.