Since Honda specs this weight, my question is how much different is the 10w30 Rotella T vs the 15w40 Rotella T. I realize it isnt JASO-MA certfied but is the formula the same just different viscosity. I used the T5 in a Nomad I had and had some slippage, so I am interested in the regular Rotella.
http://www.shell.com/rotella/products/tpl-pro.html
http://www.shell.com/rotella/products/tpl-pro.html