Originally posted by Buster:http://www.mobiloil.com/USA-En..._Specifications.aspx
These are the tests that are required for a motor oil to meet.http://www.mobiloil.com/USA-En...Mobil_1_Brochure.pdf
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.
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.
Too bad Mobil 1 5W30 off the shelf got caught failing the test for certification after it was certified. But several other certified oils have also.