2 Frantz filters, went full 7,405 miles w/o change or needing any make-up oil. Most numbers seem ok except Potassium. Silicon on the VOA for this oil was 4 ppm, so my air filter must be doing its job. TBN strong @ 8.2, PC is clean. Can a fuel additive cause the high Potassium?
Thanks for any input, Tom.
![driving.gif](https://bobistheoilguy.com/forums/images/graemlins/driving.gif)
Thanks for any input, Tom.
![blackstone4-2007.jpg](http://www.geocities.com/calbrewin/blackstone4-2007.jpg)