These are the tests that are required for a motor oil to meet.
Honda tested several synthetic oils a few years ago and most failed miserably on the TEOST test. Amsoil probably would have done well, although when I asked why their ASL 5w30 was not recommended for HTO-06 they told me it might need a "booster" oook. They only recommend SSO for this spec.
If it wasn't for Mobil 1 being such a good oil and readily available, I'd probably be more inclined to use Amsoil. I've used Amsoil in the past and for my personal application it never outperformed Mobil 1.
quote:Not All Oils Are Created Equal
Not all synthetic oils meet Acura’s HTO-06 standard.
In fact, using the wrong oil in a high-performance
turbocharged engine leads to accumulated deposits
in the engine, which reduces performance and
causes engine wear. In exhaustive testing conducted
by Acura engineers, Mobil 1 produced no critical
deposits on critical engine components such as
the seal ring, shaft, and the turbo walls.