Here is a copy of my Blackstone Labs oil analysis from my 2008 Honda Accord 2.4 Auto. The car had the original fill of Honda Z1 at about 34,000 miles. I drained and filled with Amsoil ATF x2 with 1hr of driving in between changes. This sample was sent just after 9000 miles. Metal wear levels are less than Honda but Honda averages are after 18,000 miles, half of the miles in my sample. Amsoil shows more boron, and phosphorus. Amsoil also has less calcium, magnesium, and zinc. Shift quality feels great with the Amsoil and I don't have any complaints. The only thing is that what *if* something were to happen to my tranny that was not caused by fluid type. I am approaching the recommended trans fluid change mileage of 45,000. Part of me wants to stick with the Amsoil as it seems to be working fine. The other half of me wants to drain and fill with Honda DW1, to be guaranteed coverage under warranty just in case. I love Amsoil products and use their 4 stroke and 2 stroke oil in many different applications. What do you guys think?