Turbo squealing

[marion84]

I am new to this group. Love the info provided by rawze and everyone in this group. I have a 2011 international prostar with isx15. After a hard pull I get squealing noise from the turbo. Doesn't matter if it's while accelerating or when engine brakes is engaged it'll squeal. I've had the truck since March of 2015. About the same time that I started to notice the squealing after a hard pull I noticed that if I idle at least 5 to 6 hours i come out looking like a freight train in the morning with lots of smoke. Oil consumption is at a rate of about 1/2 gallon to a gallon a week. I have had truck in the shop numerous times for weeks at a time. I got the extended warranty through navistar on the truck. I've replaced everything from the dozer on back to the dpf. Two overheads done as I kept saying that my engine brake doesn't seem to be giving me the full effect. In other words there is no diff between level 3 and level 2 on the engine brake. Had the check for leaking injectors and they found one. Was under warranty but they only replaced the one instead of all six. Put a new breather filter in. After about 20k in repairs(some warranty some not) I am still not satisfied. I feel deep in my pockets that's it's the turbo. Anytime the turbo squeals while it's trying to regen I'll get a end up with the cel light on. I've gotten to the point that I just take it to the shop and have them do a forced regen and I don't have regen issues for a while. Sometimes I wish I knew how to sabotage the turbo since its covered under warranty and be done with it. Since its under warranty I have to go to an international and 90 percent is crap. Sorry for the long post but I just wanted to give a complete list of symptoms.while doing forced regen all the numbers look fine. Turbo speed is a little fast but normal. Vgt clamps down to about 90 percent. Like I tell them. That's fine but it's not doing what it needs to do while going down the road. Any suggestions