Originally Posted by
AZTVR
R28 was for factory personnel to inspect a sample of oil for abrasive debris. It found, the engine was replaced. If the engine was not replaced, the car should have had the power train warranty changed from 5 years to 10 years or 100,000mi whichever occurs first. I am not sure if that extension was also done for R28 cars that had the engine replaced.
R29 was a design and parts change to correct a problem FCA described as "Under rare conditions during high-speed right-hand cornering when the engine is at light throttle and high RPM, engine oil can be forced into the Make Up Air hose, resulting in
unintended oil consumption."
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