So I just got done talking with the publisher of Performance Business about oil and he had some pretty interesting things to say based on a meet-up he had with a veteran of the trade in Cali. The highlights of his conversation were that the best oil you can run is Chevron or Delo (made by Chevron) 15W-40, and you could run it for 7k miles between oil changes. He also recommended ShellÆs Rotella. He said that Mobil 1 was overrated and had ôtoo much plasticö. This veteran runs a shop where he is frequently asked by motor heads to make oil for them. He also makes a lifetime oil filter made with metal mesh that only requires being cleaned with brake cleaner when changing your oil. Anyhow, based off that and 4ePikanini's tech spec post I'm switch from the standard 10W-30 to 15W-40 Chevron or Delo as my default oil of choice.