Super Cheap Auto

Proceded to research changing oil in my car, thought i'd ask the people down at super cheap nth geelong, had the oil counter attendant adamently tell me she knows the oil she reccomended was the correct oil, took it home and checked other sources as to weather this was right, only because she said the words " think and "know in the same sentence, then i found out she was actually wrong, please question before you risk your car and safety on these unlearned people until they are trained properly. I suppose soul was right in saying, "oils aint oils"