Stuff like that they are poor on trade card users. But on the flip side of the coin - Oil filters are upto 80% cheaper than shelf price, same with windscreen wipers, filters and other stuff Although oil can be had cheaper in other shops, even after trade discount it's still a bit pricy

If I want a varied lot I pay with trade for the parts/tools and then get cleaning kit on public price with the deals - works out cheaper that way