2007 nitro - major Engine Failure

[DB2009]

Hi All, I am new to the forum and need a little help, I live in the UK and I own a 2007 Nitro 2.7 Diesel, 3 month back the turbo failed at 15K miles, this was changed under warranty by Chrysler, after this I kept getting the oil light flickering on, I took the car back and waited 4 weeks for them to tell me what was wrong, I was informed I need a full new engine as there was a sludge build up and this had caused serious damaged to the engine, Chrysler accused me of running the car on Bio Fuel, which I haven’t and that they would not cover the warranty claim for a new engine, is this a one off or is there a history of this happening, after googleing it on the internet it would appear that this has happened before, any information would be great, Cheers