2003 LEXUS RX300 Engine And Engine Coolingengine Problems

2003 LEXUS RX300 VEHICLE STALLED. REPLACE IDLE AIR CONTROL VALVE TWICE**CW** THE CONSUMER ALSO REFERENCED A TOYOTA HIGHLANDER THAT HAD THE SAME STALLING ISSUE. *JB

WHILE TRAVELING OUT TO DENVER FROM OMAHA, RECEIVED LOW OIL PRESSURE LIGHT ON MY 2003 LEXUS RX300. PULLED OVER IMMEDIATELY, HAD CAR TOWED TO LEXUS DEALERSHIP. THEY IMMEDIATELY KNEW WHAT TO LOOK FOR AND SAY..THE CAR HAS BEEN MISUSED, (NO OIL CHANGES) AND OIL GELLING WAS RESULT. WITHIN MINUTES THEY SAID THE ENGINE WAS SHOT AND WOULD REQUIRE NEW ENGINE. THEY SHOWED ME THE SLUDGE WHICH WAS ONLY FOUND ON ONE CYLINDER HEAD, BY THE OIL RETURN LINE. QUANTITY WAS ABOUT ONE HANDFUL AND AS STATED, ONLY NEAR THE RETURN LINE, REMAINDER OF HEAD CLEAN. I HAD CHANGED OIL NIGHT BEFORE TRIP. THEY WILL NOT HONOR POWER TRAIN WARRANTY, SINCE I CANNOT PROVE OIL WAS CHANGED EVERY 7500 MILES. CAR HAS 50,000, AND I PURCHASED CAR FROM INDIVIDUAL WHO STATED HE ALWAYS MAINTAINED CAR BUT CANNOT PROVE WITH RECEIPTS. CALLED CUSTOMER SATISFACTION LINE WHO SAID UNLESS I PROVE THE ORIGINAL...