Question: Oil Analysis Recommendations

[BombDocDiesel]

I'm looking for some help. I have included both my 7,500 and 15,000 mile analysis.

I had 15,000 miles on my oil when I pulled the sample. The truck has 21,000 miles total. I was told the Silicon, Iron and Copper are very high. It was suggested that the Silicon being high indicates an air leak in the intake or poor filtration.

The lab says the oil would be good for an additional 7,000 miles but I did an oil change when I pulled the sample. Should I reduce my OCI from 15,000 to something lower?

Please help me out. I'm a newb at this and trying to understand the wear metals reports on the information pages is apparently a bit above my level. Thankfully I only disarm bombs for a living.

 

[S Phinney]

You can run Amsoil for 10,000 miles and be equal in cost of regular oils. Why bother with running it longer and paying the cost of an analysis?

 

[BombDocDiesel]

This was my first run to 15K. I was planning to keep going to 15 or possibly backing down. With the by-pass set-up I was hoping to run over 10K.