The last oil report the copper was 10 & Silicon 29.I use Syntec 10/30. It is time to put real oil in. I have AMSOIL 0/30 5/30 10/30 Synergyn 3/30 and Mobil 1 10/30.I took off the AMSOIL air filter and put on a NAPA gold. I was thinking of the AMSOIL 0/30 or Synergyn. The car will have 10000 miles when I change. Thanks