Originally Posted by southbound35west

my ford service super told me i should not run rotella in my 2006 powerstroke because it does not contain anti foaming agents in the oil for the high pressure oil system in these powerstrokes................is this true or false?.........................he sure let me know that their motorcraft oil contains the anti foaming agents and thats what i should be using or mobil 1 oil.................what is the best oil for these 6.0's? i am in warm texas climates and i have been using rotella 20w-50 oil in it since i bought it new. thanks for any info..............