I've been noticing recently that a lot of garages and quick-lubes in my area use Castrol oil. Mr. Lube, Costco, Active Green+Ross, Firestone Tire and (I think) Speedy all feature Castrol oils as their house brand. Has Castrol been going out of its way recently to woo the quick-lube market? I know a lot of places change brands frequently simply based on price, so this could just be temporary coincidence, or is it a main focus of theirs to get their product out in this way?