NHTSA Complaint #749550 — 2000 LEXUS RX300

INSPITE OF CHANGING THE OIL WITHIN WARRANTY GUIDELINES, MY RX 300 DEVELOPED ENGINE SLUDGE IN THE 3.0 6 CYLINDER ENGINE. A SEARCH OF THE INTERNET DISCLOSED THAT NUMEROUS OWNERS OF THE RX 300 AND OTHER TOYOTO CARS, LIKE THE SIENNA, HAVE DEVELOPED ENGINE SLUDGE EVEN WITH TIMELY OIL CHANGES..THROUGH THE INTERNET I HAVE ALSO LEARNED THAT " THE 3.0 LITER V-6 ENGINE FOUND IN THE LEXUS RX 300 WAS REDESIGNED IN 1999. IT WAS MODIFIED TO IMPROVE FUEL EFFICIENCY AND REDUCE POLLUTANT EMISSIONS. THIS MODIFICATION INCLUDED REDUCTION IN THE SIZE OF THE COOLSNT PASSAGE ON THE HEAD GASKET SO THAT CYLINER HEADS RUN AT EXCESSIVELY HOT TEMPERATURES. THE OIL IS LITERALLY FRYING, RESULTING IN SLUDGE." HTTP: PHILIP.GREENSPUN.COM/MATERIALISM/CARS/SIENNA.HTML. ALSO, FROM WWW.CARREVIEW.COM/REVIEWS/VANS_MINIVANS/PRODUCT_225.SHTML "...THE COOLANT SYSTEM MAY NOT BE OPERATING CORRECTLY OR THOROUGHLY ENOUGH TO KEEP THE OIL FROM FRYING AND SLUDGING UP ULTIMATELY CLOGGING THE PORTS AND BURNING UP THE MOTORS. SOME MECHANICS THINK IT HAS TO DO WITH THE ALUMINUM HEADS WARPING...AND NOT JUST IN THE SIENNA, THAT ENGINE HAS BEEN REPORTED TO HAVE PROBLEMS ON THE LEXUS 300.."*AK