UPDATE! Powerstoke 6.0 Oil Cooler Lime-A-Away backflush Ford F-250 F-350 coolant flush Lots of rust

Flush Video https://www.youtube.com/watch?v=cDbY8PRbDHU
I'm very happy!!!! a $4 bottle of Lime-A-Away saved me about $600 and about 12 hours of work. I was already pricing out the oil cooler and gaskets. I was going to update the EGR cooler to one the new stainless tube designs. When I got the truck over 5 years ago the deltas were around 12 on the freeway.

Backflush tool
https://www.amazon.com/gp/product/B074JSLZCB/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B074JSLZCB&linkId=7ac2bb53b4deeab3b2110ecdf199c54a