2 x 5L (10 litres) Shell Helix HX5 engine oil for $45 from Repco
Not a bad price. Works out to $90 for 20 litres of the stuff which is a better price than I've been able to find buying it in a 20L drum. Supercheap Auto is selling the same for $27.88 a bottle which works out $10.75 more expensive.
The promo starts tomorrow.