I too agree, your blow by could be from sitting for years and causing some of your oil consumption. I would change your oil and filter and use Delo this round. (Walmart has both for less. Costco will have just Delo.). Run it for 3,000 miles and see what happens. Read some prior posts to confirm but as I recall some suggest a quart of Marvel Mystery oil can help with stuck rings. Give it some time before you abandon ship.
Don’t assume anything the PO said is fact. Maybe he did the turbo seals, but maybe he or his mechanic did them wrong. So look for a good amount of oil in the intake side of the turbo. Clean then there is no leak on the intake side. A little oil would be suspect, a lot of oil and that is a leak. Also see if you are leaking oil somewhere onto the ground, maybe you are loosing oil to the outside too. Main seal, valve cover, oil cooler etc. These trucks seep but shockingly most of us do not experience big leaks. My engine is dirty and greasy from 30 years and 189,000 miles but I do not seem to leak onto the ground. Your CDR valve does not stop blow by, just tries to separate as much oil as it can. Remember a diesel can burn oil, a gasser only tries to. (You may not see white smoke out of a diesel unless running down an exhaust valve and partially burning in the exhaust system.)
However you do need to take a reality check if a IDI is the right truck for you. Your truck is 28 years old and has 190,000 miles. Two things kill vehicles, age and mileage. Your truck likely has a few years and thousands of miles left to go. But at the cost of wrenching on it regularly and spending good money. So if working on your truck every month is not what you want to be doing (You rather spend your weekend in a tree stand or at a lake.) think about a new or slightly used gasser F150 or 1500. Buy yourself out of wrenching on a 30 year old truck By getting a new one that only needs oil changes, brakes, and tires for the next 60,000 miles.
Also note you are not the only one to ever gotten frustrated with these old beasts. Take a day or two off, cooler minds will prevail.
But overall most of us find they are runners and don’t leave you stranded very often if you take care of them. Also know that any diesel will cost you double to operate vs a gasser. Point in case you will use about 12 quarts each oil change vs 5/6 quarts with a gasser. Spark plug $8, injector $80. Fuel pump $200, rebuilt injector pump $800.(Or more if your core was not rebuildable.) Unless you got lucky you likely paid double for the little emblem on the front that said “Diesel”. If you tow or just love the smell of diesel in the morning it’s all worth it. If you just bought a cheap hunting truck well maybe that was not the case after all. So it’s time to decide what works for you before you dump a bundle into it.