BlueOval, good to see a familiar name. The treatment is 2 oz per quart. Since your engine is 6 quarts that is the full 12 oz bottle. If you have over 100k then you are looking at two applications. If you get the 3 bottle special you can use the last bottle for maintenance applications.
I used all three bottles, and still needed a forth. I bought three more, and used two and one half of those up already. I ended up treating all four of my vehicles, and the transmission in my truck which is due for a fluid change.
Based on what I have read here, I don't think we have a big sludge problem in the trucks because the large 6 quart capacity helps the oil not to run hot. My objective is for the rings to seal better by cleaning up the piston ring groves.
I'm at 500 miles on my treatment, and my gas milage looks to have improved a bit. I am at 1/2 tank which is usualy about 150 miles. It hit it today at 179 miles.