We have talked about how M1 does not cause leaks but will find a leak by cleaning up a seal that is not 100% and then start to find it's way out of the seal and leak. Well if you have a new car and all the seals are 100% the engine will not be leaking M1. My question is if you use M1 and all youe seals are 100% will M1 keep them 100% and for how long? If the seals start to break down will they be "used" to M1 and not leak as if ther was build up preventing the leak? I'm wondering this because both my viecals were bran new and I have used M1 from the 1st oil change and I want to get at least 200,000 leak free miles out of them. Will Mobil 1 get my seals to this mileage leak free?