Hi Profrat,
I did a snap inspection of SuperCheap Auto (SCA) and REPCO yesterday. Both of them have sales on leading up to fathers day. Both have good sales on various name brand oils, but neither have sales on their "house" brand oils (REPCO oil or Chief oil at SCA).
This seems fairly usual to me. The house brands are a good deal compared to the name brands at full price. But with sales being so regular, you should never pay full price for the name brands. I rarely, if ever, see the house brands on sale.
Yesterday, the better buying was the name brands, at both stores.
REPCO had Valvoline SynPower at 25% off (5W30, 5W40). They also had Nulon and Penrite SemiSynthetics at 15% off. A few weeks ago they had 45% off Valvoline SynPower and Shell Helix Ultra.
SCA had Castrol Magnatec ( 10W30, 10W40) at 40% off, with Castrol Edge (5W40) at 25% off. They also had Penrite 10Tenths Racing (pure group 4 &5) and Shell Helix Ultra (new GTL full synthetic ) both at 15% off.
Hard to look at house brands when the above stuff was almost the same price or even cheaper.
BTW most Penrite full synthetics are group 3 oils. Only their 10Tenths oils (racing or premium) are full group 4/5 oils. I would suggest that if Penrite made the house oil for REPCO it would be their normal group 3 synthetics. Penrite would keep the special stuff for themselves. Also REPCO could change house brand supplier depending on the deal offered at the time. It will always be good stuff, may not always be Penrite.