Originally Posted by Bacadiesel
If you want to send me a sample of your penn ultra when you do an oil change I can send it to black stone labs. I will also send a sample of Amsoil from my car and we can see how much difference
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Im down. Im at a lil over 5k right now with an open element filter which may add to the silicone content. What mileage do you suggest we do this at? What Amsoil are you running?