Originally Posted By: Pablo
Originally Posted By: kr_bitog
Just wondering why Amsoil is not recommending more than 2 application without oil change ?
As stated, Amsoil PI is for what I call strong dose cleaning and once all the stuff breaks free and PI and crud inevitably go past your rings, the oil should be changed.
As for you guys using SI-1 regularly, there should be no need for PI anyway. I PI my cars once a year with two bottles and change the oil. They always run better after the treatment. I just use the supermarket gas from Safeway down the hill so, I imagine it has "light" cleansers.....
Thank's Pablo, in my thinking most of the crud will be blown to the exhaust rather goes pass the ring, so I have difficulties to understand how much that little amount impacts on oil, except if the PI never burns clean and stick to the cylinder wall.
The issue I have is even I go change my fuel filter regularly, I still find the injector fouls up quite quickly that will be solved quickly with one dose of injector cleaner/SI-1. Maybe the injector is near end of their life, but just hope can hang there for a while.