Just giving different weights and brands a try to see how they compare. First run was Amsoil XL 0w20. The P66 10w30 sheared down to the 20's, which is recommended for this engine anyway, so not concerned about it. But hey, it was $1.99/qt at Orscheln's, so at that price, it appears to be a good value oil. I ran it until my wife told me the change light came on, which is at 5k. I've got Amsoil OE 5w30 in it now, so I'll run another UOA to see how it does. Ran a Toyota oil filter with it.