I did this test a few years ago. left line 22,000+ miles right line 9,154 miles
Let me help you out, I had a 6.0 using the PCO AMSOIL 15W40 and it lasted 22.000 miles here are the results.
miles on oil sample
22,000
Aluminum 19>14
Chromium 4>2
nickel 0>0
Iron 92>62
Copper 21>22
Lead...