Why PCV valve keeps failing?
The last one is a week old - its an Acura part. This can also cause high NO.
Mobile 1 5W30 has been there for 3k miles. Its brownish (dark side) but appears very thin/fluid.
So this and gasoline smell are the ones I am trying to troubleshoot now. Gasoline smell is from the engine compartment but it is probably soon after starting the car and seems to go away. There is no sign of fluid leak in the engine compartment.