NHTSA Complaint #10161363 — 2000 TOYOTA COROLLA

2000 TOYOTA COROLLA - OIL CONSUMPTION. I, LIKE A NUMBER OF OTHER OWNERS, HAVE EXPERIENCED WHAT I CONSIDER HIGH OIL CONSUMPTION. MY MILEAGE IS APPROXIMATELY 62,000 MILES. CARBON BUILDUP OCCURS ON VALVES RESULTING IN LOUD RATTLING (DETONATION) UNDER ACCELERATION, ESPECIALLY BETWEEN 2500 AND 3500 RPM. DEALER SAID THERE SHOULD BE AN EXPECTED AMOUNT OF OIL CONSUMPTION BETWEEN CHANGES BUT I AM ADDING CLOSE TO 2 QUARTS PER CHANGE. COMPRESSION TEST WAS FINE, ONE CYLINDER SLIGHTLY HIGHER IN PRESSURE. DEALER SAID THIS INDICATED A POSSIBLE STICKING RING. SUGGESTED A GM COMBUSTION CHAMBER CLEANER MADE BY AC DELCO TO BLOW OUT THE CARBON. TRIED IT. IT WORKED GREAT FOR 3 MONTHS. THE DETONATION IS BACK ALONG WITH THE OIL CONSUMPTION. OWNED A 1995 COROLLA WITH PORTED AND POLISHED ENGINE AND IT NEVER USED A DROP BETWEEN CHANGES. *JB