First, change your PCV valve. Then go to NAPA, Autozone, or Advance Auto Parts, and buy two cans of CRC GDI intake
valve cleaner. Following the instructions, spray both cans into the intake while someone keeps the engine at 2500 RPM.
Let it sit for an hour, then drive it at highway speeds for ten minutes. Purchase two quarts of NAPA Techron Concentrate
and use one quart for each full tank of gas. After using two tanks of gas with Techron, change the engine oil to Mobil
1 0W-40, and keep an eye on oil consumption. Also, after changing your oil, install an oil catcher. Keep us updated
if anything changes. If nothing changes after all this work, then the cylinder walls in your engine could be scored and
there is nothing else you can do. Keep us posted on your progress and good luck!