Excessive Oil Consumption caused the PCV Sensor/Actuator (Exhaust Camshaft Timing Oil Control Valve) to fail. While the vehicle is still operable, the failure causes engine timing to change resulting unpredictable losses in power during acceleration, excessive fuel consumption, and incomplete combustion passing through the Catalytic Convertor posing a risk for future component failure. In the four months that the vehicle is operating in this condition, with its check engine light on, I have had two near collisions while attempting to merge into roundabouts and freeway entry. Fortunately, both were avoided. I no longer attempt freeway entry during rush hour. Two independent service repair shops did a computer diagnostic test and confirmed the problem with the PCV components. They suggested that the excessive oil condition be corrected first. Otherwise, any replacement components will continue to fail. Excessive oil consumption appears to be a chronic problem in the Hyundai 2.4 L engine. The engine and drivetrain is covered under a 10 year or 100,000 warranty. A year earlier the dealership performed a controlled test when the vehicle only had 60,941 miles, where the initial oil loss was 2.5 quarts per 1,000 miles. An Oil Chamber Combustion Clean, where solvents are used to remove excess carbon was performed. It temporarily reduced the oil consumption to .7 quarts per 1,000 miles. This is still requiring a replacement of about 2 Quarts of oil between routine oil changes in a 5 quart system. The dealership indicated that it passed. About 3 months later the oil consumption increased to 1.0 Quart per 1,000 miles and 8 months later the PCV components failed. If the dealership did the right thing and repaired the engine to eliminate oil consumption, everything would have been fine. I am still trying to get the dealership and Hyundai to honor their warranty. for excess oil consumption. With it the PCV components are also replaced and all is good.