My oil light recently came on in my car. I parked on the side and checked it. There was none on the stick. I added 1 liter and drove about 500m to my garage.
I asked him to do an oil change and to check if the car was leaking oil or if it looked like it was burning it. They found no leak so it look like my car is burning oil.
My question is can a performance air filter (commonly call p-flow) make oil consumption worse? My mechanic suggested it might be the cause to the oil burning.
Note: I would like a general answer. However, I have a 2009 Volkswagen Jetta City.
UPDATE : I can say that after returning to the stock filter, the car has not consumed oil at all (for well over a year - I think 3 oil change since). I might have been because the filter was more restrictive than the stock one as explained in Fred answer's below. But in all cases the consumption stopped when back on a stock filter.