Are there any recommended additives for the 6.0's? I've been seeing where guys are using 2-cycle oil , ATF , as well as many others . This is a very confusing issue . I've been adding the Lucas fuel treatment , haven't noticed any major MPG improvements though . Perhaps this is doing more harm than good . Most of the 2-cycle conversations are dealing with CUMMINS engines , I don't know if this works on Fords or not . Any suggestions or life experience would be appreciated . THANKS

 

ATF has friction modifiers in it, which shortens life of the injectors. I've been running Indol (Cenex brand of ultra clean hydraulic oil), which I've been having good luck with it.

 

I run CRC Ind. Diesel Fuel Therapy. Its a nice lil additive. I like it alot

 

I can only speak for my D-MAx but i have been running diesel kleen cetane boost. It seems to do good.

 

Double dose of Diesel Kleen a few times a year.
Quart of supertech ATF with each fill-up.

Got rid of my Powerstroke, never had any trouble, truck had over 80k on it.
Be sure to change your primary and secondary fuel filters AT LEAST once per year or 10,000 miles for best performance.