I notice STP filters heavily promoted in a package deal with 5 qts of Mobile 1 syn. at Autozone. Similar deals at Advance Auto and other major chain parts retailers. Having installed many of the cartridge type on my German vehicles, would be hard NOT to recognize a poor quality/deteriorated or compromised gasket as they require some manipulation to place in the correct position beyond the threads. Difference story for the cannister type filters I use on my Triumph motorcycle, (Mobil 1 108A) taking care to be sure old gasket is removed and new gasket is well lubricated when installing.