Really, Beth, 6 Cars?

If I put a particular brand of tires on 3 of my autos that all threw rods within 1 month of installation, I'd try another brand of tires! But you're telling us you put an oil additive in a car and it failed, and you did it again on a different car (same result), and again, and again, and again, and (finally with drum roll) AGAIN?!?! Do you really believe we're all idiots? Come on! By the way Beth, what is a rod? Was it always the same rod? Do you even know a rod does in an engine?

If all of what you say is true, then please, provides us with details of what kind of cars you drive. Well, I might believe you if they're all "good" used Yugos.