This is an interesting development for guys like @smokewagun who had issues across multiple engines. Turns out that it wasn't the engine, but the PCM that was the cause of the oil consumption.

 

Very interesting.

I don’t think it’ll be hard too find an owner with the oil consumption issue to perform said PCM update.

Much better than the first remedy.

Interested in seeing if it really works.

 

Thanks for posting, reps sent. I'll gladly get this completed once available and post my results.

Hopefully, the fix actually works.

 

This is fascinating. I routinely go down the mountain in a lower gear (3.5L EB, but still) in order to get as much compression braking as I can. I would imagine most of us do something like this.

 

So now I wonder if the people with the highest oil consumption issue tend to live in hilly or mountainous areas.
You would think all their engines would do this, I wonder what makes the 5.0 more prone to allowing oil to seep past the rings in a state of vacuum?

 

Well, after my replacement mill heading down the same road, it was a wild card for me, until this TSB. Even considering this latest development, I can’t help but wonder if it’s just another band-aid fix for the crappy plasma coated cylinders. Time will prove or dis-prove this TSB. Had I incurred cost to trade to the same optioned and trimmed truck, I’d be sick. But, I really love my new loaded Lariat 3.0L, and being the basic guinea pig for the 3.0L on this board, has really been positive. I loved my last 2018 and the V8, but the oil issue started to get on my nerves. Hopefully they get it right... about time the 4.6L is released to replace it, just prior to the V8 going to the history books.

 

So some of the PCMs received the proper software but others didn't? This seems strange. If this is the case there should be a recall on all 5.0s for reflashing or reprogramming of the module right? How would they determine which modules received the correct programming and which ones didn't? Why is there more than one program floating around? It's just a weird issue.

 

I just picked up a new f150 5.0. subscribed.

 

My first thought was an issue with the crankcase ventilation causing either excessive pressure in the crankcase or excessive vacuum. It will be interesting to see how the deceleration reacts to a cracked throttle plate. I am guessing more brake will be involved with this new program.

 

It's a case of reverse "blow-by"? Would that be...Don't want to go there I suppose...

I think it just might make sense but "why isn't it a problem with all engines" is a valid point.

I just bought a 2019 SuperCrew w/ 5.0 (with 20K miles on it) and haven't driven it 1000 miles myself.
I checked the oil last Friday before a little trip (500 miles total) but I will check it again tomorrow.
I'm here in the "flatlands" of southern Florida so not much engine braking in my driving.
I'm watching this like all of you.

Steve
"Most of my money I spent on cars, trucks and boats, the rest I just wasted."
Magma Red ain't really "red", I don't care who you are!

 

They probably did some kind of design change to the rings to make them "compatible" with the plasma coated cylinders (that is pure speculation). Hence high manifold vacuum exposed some kind of weakness in the ring design.

 

I also question why there are multiple versions of the PCM software ? The next question is "Do they program the PCM's during assembly of a vehicle ? or are there different PCM's for different engines ?

Suspicious minds would like to know ?

 

I love all the unknowns and questions. It only solidified my choice to move on. By the time they sort this out, I would have been out of warranty and looking at my next truck anyway.

 

Hope those with the 2019 5.0 don't have as big a problem figuring out the dipstick as I have had. It has read on low hatch mark but high on upper after dealer oil changes. Have topped it off twice with about a quarter of a quart both times and it reads high on both marks. Goes back to those original readings and stays there. Hard to figure. I don't think this truck is using oil and have about decided to not worry about it as long as it registers oil on one side or other of the dipstick.

Why do even dipsticks have to be hard to figure out now?

 

With almost 9 quarts of capacity (8.8 IIRC), the 5.0 gives you a lot of space for error. I would be inclined to not add any until you got to the bottom of tha hashes.