anyone on here who has a 6.0 and did a coolant flush or refilled their coolant? Ill be doing an EGR delete on one this weekend and i need to drain the coolant, ive done tons of mods to diesels but none that required me to drain the coolant, or anything with the cooling system. my question is, what coolant should i use, how much does it take, and how do i go about refilling the system? half water/coolant? how much do i put in at a time? i was thinking of going with CAT extended life coolant, like ive seen they recommend on many of the forums.