[BlackTalon]

Please introduce yourself, as it's always a little questionable when someone makes a post like this as their first, and remains anonymous.

Curious about the warranty... Was it from them for work completed earlier?

2 quarts of oil in 4k miles is not all that high for a turbo. Unless you were blowing out a black smoke cloud, it would have been much, much cheaper to just add a quart every couple of months.

As far as shops proceeding with work without calling the car owner first, unfortunately that is SOP for most places. The bill when you go to pick up your car is often 2-3xs what they estimated, and they almost never call to discuss before proceeding with the additional work. Once they have you car up on the lift, they pretty much tear through it until it's done; they don't want to stop and wait for approvals, possibly offload the car from the lift and bring in another, etc. It is a frustrating thing, and far too widespread.

Also curious why they touched your brakes for an oil leak issue...