Ya have to be carefull when buying oil at any Dollar Store/All for a Dollar/Dollar General.
Sure, they sometimes carry major brand oil like QS but, the oil that you never heard of, stay away from it! It may be OK but, why risk it when most AAP/AZ/PB's are not far from any $tore and often have a sale on the good stuff w/filter.
My Dollar General has QSGB for more money than the AAP across the street. And other care care products also cost a bit more than the AZ in the same parking lot.
Be carefull!