I think that all comes down to how much you trust the products out there.
Amsoil is ranked # 1 worldwide,it's use in many competitions across the US & overseas.
Now,if any of us don't feel comfortable having one oil change a year then amsoil isn't the right product althought the product is made to last 2 or 3 times the average product according to all those tests.
But we all forgot the burning issue our engines came with so if you go amsoil you may have to purchase extra couple of bottles or more depending on how much oil your rig is burning which increase the amount of $$$ you have to pay for the luxury of using amsoil & don't ended up mixing amsoil with any other product.
Dakar was just the begining.