Burning Oil FAST

I have a 2019 grand touring (2.5L turbo) with about 44k on it that's been going through oil pretty quickly. Most recently It went through at least 2 quarts in 4100 miles/4 months. Luckily I caught the low oil (it was bone dry) and was able to get it in to my local mechanic who says the PCV valve might be bad, it's definitely not a leak. He also said that i should take it to Mazda since it's still under the power train warranty. This oil burn isn't normal right? What should I tell Mazda in case they try to tell me that they won't fix it under warranty?