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Same problem here. I checked and changed my oil regularly and religiously. Kept constant maintenance on the vehicle. "Babied" to the point of being OCD. But at 200, 000 miles my engine started the same rapping. I knew it was a rod knocking. I immediately pulled over and checked the oil. I was down by 4 quarts and the oil light NEVER came on. I added the oil, but the damage was already done. I checked the undercarriage for a leak. NOTHING. However, I did find THIS: "Occasional problems on this vehicle are failure of the Intake Manifold Gaskets, the Fuel Level Sensor, and the Engine Short Block. Failure of the Intake Manifold Gaskets may cause a rough idle or the Check Engine Light to illuminate. Failure of the Fuel Tank Sending Unit may cause the Fuel Gauge to be inaccurate and may turn on the Check Engine Light. Lack of maintenance can cause the pistons rings to stick resulting in excessive engine oil usage. This engine oil usage can lead to piston rod bearing failure resulting in replacement of the Short Block."Report it
For your engine to leak 4 qts of oil you must have seen oil in the driveway. You neglect to say how many miles you have. You must check your oil at least 1 time every 1000 miles.You have failed to maintain your vehicle properly.Report it
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