ok i change my wifes oil in her 01 4runner, i notice it didnt have a drain plug gasket but it wasnt leaking. so i left it that way and decided to keep a eye on it. A few days later still no leaks but decide to add a gasket just 4 the hell of it. it starting leaking right away when i added the new gasket (adavance auto gasket), so i removed it and shes fine. is anyone else runing with out a gasket??