Ruined overhaul??

Did you use cat parts our jobber stuff?

Did you idle it a lot or not work it hard after inframe. I'm firm believer that the engine has to be ran hard under load after rebuild or you'll have a oil burner.
The first 10,000 miles are crucial to the way the engine will consume oil

 

Even with genuine CAT stuff I have seen them slobber like a stuffed pig after rebuild. I'm talking oil running out of the flex pipe bad. Max it out and load it down for a good while will seat everything in short order. Need some cylinder pressure.

 

I had a 4mg 425 B model once. Had it rebuilt using IPD parts. Used about same amount oil as yours. Was rebuilt 2 more times under warranty and still used oil. After we rebuilt it a third time I paid extra for all cat parts and it was fine after that.

But then you hear people that have 0 issues with jobber parts so who knows.

I know one thing , I'll never use anything but genuine OEM for now on.

You do have to work the snot out of them when fresh for sure. Helps seat the rings

 

We have done two rebuilds using ADF after market parts and both times the engines smoked and used major oil. ADF would not warranty any further work and said it just needs more time to break in. This went on for months! But, after about a year, it did actually finish breaking in and oil consumption went down.

 

On the old Cat heavy equipment, the fix for this was to carefully feed Bon Ami cleanser into the intake as it is running at an idle. About a tablespoon. Then run it full throttle for a minute. This seated the rings to the cylinders.
This was the actual service manual instructions if you had one that slobbered oil or had high consumption. For a new or rebuilt, not one that is worn out.
I would try that before I would tear it down again.

 

what part number ring set were you supplied with IPD?

it will be an "RS" number

 

Load it up and work it, it seems the opposite of what it should be but that's what they say to do. I know a guy who did his own inflame and nobody told him to work it good to break it in and it's always used a gallon of oil every oil change since.