Recent content by JamesMontana

About 1 year, yes. Thanks for the tip re 2x per year!

I did my first UOA with Blackstone. Interesting results! 1. It seems that 15K is a fine OCI for full-syn in my Mazda3. I used Castrol GTX Magnatec with a FRAM Ultra filter. 2. Too much aluminum wear, according to Blackstone. (See below for their full comments.) Any thoughts from other Mazda3...