I'm pretty sure that all d-max's to this point have piston squirter's. Piston squirter's are a sure way of keeping pistons cool and have been in use for a long time. As far as I know, the ultra low sulfur fuels are effecting lubricity for moving parts in the fuel system. Not exactly sure what effect this has on power.
So what, if anything is everybody doing to address the lack of lubricity problem of the new low sulfer fuel?