Also, regarding the oil leak and valve seals I have a bottle of oil treatment zinc additive with “stop leak”. I was going to add that in to help out the cam and hopefully stop the oil burning off on start up. I actually got a bottle for each truck.
Ok... does your truck have a flat tappet/ if you have a roller cam dont do that.
Also, you have oil at startup, you my sir have what sounds like leaky valve seals.
tired old engine with weak valve seals. You can use nice additives, they can help, but they dont bring back something from the dead if its dead.
I mean im not one to peddle a snake oil, I have used a few products that have done
something but its really not likely to fix a mechanically worn out thing, so you need to really check your expectations if you decide to try something.
For oil burning, generally. engine restore. It should increase compression (for wear on cylinder walls) its not really by design able to do much about the valve seals but if there were theoretical in consistencies on your valve seats and this was inside the chamber it probably could technically help but its definitely only able to do that in the most roundabout and not often way unless you have a lot of oil consumption lol.
Also, equally, engine deposits. Rich fouled plugs? Oil really black? Hesitations or bad heat soaking? this wont help that.
For engine seal like oil pan leaking, ive actually had good luck with top end oils because they had leaked and now they are slowed the hell down. that was amsoil and i had no intention of monitoring this for repair, only going by what the floor says and /snow and that was a while ago
For engine running due to fuel deposits on your TBI injectors and cylinder deposits, a single nice treatment of **** in your gas tank is about all youre ever gonna get from dumping one in. I fixed my car having hesitations and boggy running when i did it to my 1990, also the on ramp to the freeway a few times, black smoke and it came alive to bring me up to a smoking 165 or less hp like it used to. None of that 130 hp or other stupidness! Jk lol, but it really helped the driveability, because injector deposits. Its not gonna clean your cylinders much and its not gonna do all much for the valves that gasoline doesnt do already but if your injectors are clean more appropiate vaporization allows better cleaning so that would be indirect.
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THE ONLY THING THAT WOULD IN MY OPINION POSSIBLE TO LIFE/DAY THE ISSUE is a treatment of GM top end engine cleaner. Its also expensive on amazon, you should try looking at a dealer. But other companies may work well, and someone may make it for GM as private label and sell it on their own right. GM does this with chevron/Techron on DEXCOOL, and injector cleaner. No idea about this stuff. Anyway, that video is project farm and he had results with seafoam but you need to use it on the intake and soak, you cannot dump something into your tank and expect your valves to be clean and sealing the next day lol.
If you try injector cleaner, restorer, and do a top end clean, you may just bring your compression enough to not have issues. Clean your TB and verify the PCV is good and not full of oil gum and your hose is the right kind and that your other valve cover breathes with the proper setup
