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 owners or UOA veterans? I have a broken motor mount (to be replaced this week, just found it) which may have caused some extra vibration. I do not see any leaks in the air filter or intake, and the air filter is changed regularly (every 15K).
Comments from Blackstone:
Aluminum and iron are above average in this first sample. Universal averages show typical wear levels for Mazda 2.0L engines on the oil. A longer run makes the iron level okay, but doesn't really excuse the extra aluminum. Silicon might be to blame if it's abrasive dirt. Check the air filter and intake for any cracks and leaks. This may just be a normal amount of piston / bearing wear for your engine, but only trends will make that clear. The TBN was okay at 1.2, showing some active additive left. Try ~15,000 again next.
OIL Castrol Magnatec Full Syn 5w-20.
MILES IN USE 14.9k
SAMPLE TAKEN 09/20/2017
ALUMINUM 8 Universal average: 3
IRON 33 Universal average: 11