Originally Posted By: Branson304
Originally Posted By: GMBoy
I've noticed a few recent posts on BITOG where people have gotten brand new cars and already start using MAXLIFE oil. WHY? Why would anybody use a high mileage oil in a brand new vehicle? I surely wouldn't want any high mileage oil seal swelling additive in my NEW car until the day came that it did need it.
It doesn't "swell" your seals, that's what stop leak additives do... high mileage oils have seal conditioners that simply keep the seals soft & pliable to prevent leaks. And guess what? Many places that carry Valvoline use MaxLife as their main synthetic blend going into new & old cars alike. There's no harm in running a high mileage oil in a newer engine, no harm AT ALL. I would never hesitate to use MaxLife in a young engine. If it was so horrible for engines & their seals, it wouldn't meet DEXOS, API SN & ILSAC GF-5. Ignorance is bliss.
Actually more seal conditioners are a requirement in some of your latest ratings.