Castrol Edge 5W-30 5L Engine Oil $56.49 @ Supercheap Auto ($48.02 via Pricematch at Mitre 10)

Back again.
Usual price on this is $112.99 at Supercheap.

Repco(repco.co.nz) - on special at $84.75 (usually $113)
Mitre 10(mitre10.co.nz) - $110 (PriceMatch at 15% off = $48.02)

Lots of other oils at 50% off too - see here(supercheapauto.co.nz)