6.6L doesn't that annoy you, Can't just buy one 6L bottle. I find Black Thunder annoying in that it takes 8.3L. Can't buy Penrite 10w 40 in 10L so have to buy 2 x 5L or wait for something else to come on sale. I bought 2 x 6L Nulon full syn from Autobarn for less than I could get 2 x 5L bottles of Penrite, even with 30% off at SCA. I actually will have enough oil left at the next service that I can just buy x 1, 5L Nulon 10w 40. Hopefully Nulon comes on sale again or I will be needing to buy something else, and will have to pay $90 just for oil. Old ute I could buy whatever I liked and more often than not it was some Gulf Western when it was on sale, and 5L IIRC was enough with a little left for top ups.