oil down quart n half a month on 2006 Subaru Outback

recently had timing belt n water pump replaced wher is oil going no leaks have 111,400 miles can it b burning this fast ot is a seal leaking inside where they replaced timing belt

Asked by for the 2006 Subaru Outback
2 answers 2 comments
Poss. headgasket (external) leaking oil onto exhaust and burning it off that way. Globalhelper is correctfor internal issue(s). Maybe get references to another shop and have a second look.
its normal for higher mileage eng to use 1/2 per 1k miles of driving. this maybe ok per dealer spec's
dealership says cause of oil burning is the catylitic conveter this true? also do i need a ct conv. emisions n all i live in fla
catt can only burn oil if oil gets there from eng. you have an eng problem for sure