I installed a Walmart $3.97 Purolator Classic last night. Was using the Fram Xtended Guard for a couple years, but decided it was overkill for 6k OCI. Never used the classic before. As I hand tightened I could feel it deforming so I stopped. While the car was running I put my hand on it to check for leaks, could feel the filter walls pulsing as the oil passed through. Thats thin. Is this normal for a classic? Or is this the Walmart version of the classic?