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1. 2011 2. 155k Miles 3. Original Motor 4. Daily driven Got the car in the summer of 2020. Has been solid overall just did a turbo swap because as usually original was drinking oil.

Sorry if this question is redundant but you would suggest pcv and catch can along with a check valve then seeing how that improves oil consumption?

Would you suggest gwttea restriction bolt on a new stock ko4 turbo?

Just to throw my opinion in is that it is to much for the overall milage and problems. Even though used cars are higher right now replacing a turbo and fixing those problems should be added to the price of your car in your head.

I do notice a difference it oil I have alway taken it from whichever is lowest just to be safe. But I do not know which way is correct

This is my situation. I have a 2011 mazdaspeed 3 with 152k miles on it. It is on the stock Ko4 turbo. It has all the basic mods HPFP, Cob accessport, catback cork sport exhaust , and intake. My car has been burning oil at a pretty good rate at this point about a half quart to a full quart every...