1999 DODGEN BORN FREE Engine And Engine Coolingenginegasoline Problems

MY WIFE 1999 DODGE DURANGO ENGINE FAILED AT 78,000 PLUS MILES. OUR EXTENDED WARRANTY COVERED WAS OF NO USE SINCE OIL SLUDGE ON THE ENGINE WAS IDENTIFIED BY WARRANTY COMPANY (NATIONAL AUTO CARE CORPORATION). COMPANY CAR MECHANIC STATED ON REPORT THAT THE OIL SLUDGE WAS THE REASON FOR ENGINE FAILURE, THEREFORE THIS VOID THE WARRANTY. CALLED THE COMPANY (MR. BEYER) AND NOTED THE FACT THAT THE ENGINE FAILED DUE TO MECHANICAL FAILURE THAT RESULTED IN OIL SLUDGE ON THE ENGINE. MY RECORDS REFLECT THE FACT THAT OIL WAS CHANGED MORE THAN REQUIRED. AS A PROFESSIONAL MECHANICAL ENGINEER I NOTED HE OIL SLUDGE IDENTIFIED WAS NOT CONTRIBUTE TO LACK OF OIL CHANGES BUT THE FAILURE OF THE MECHANICAL SYSTEM THAT PUMP/SEND OIL THROUGH OUT THE ENGINE. I OFFERED TO PROVIDE PROOF TO THE WARRANTY COMPANY THAT LACK OF MAINTENANCE (OIL CHANGES) WAS NOT THE MAIN REASON THE ENGINE FAILED. I'M STILL...