My local mechanic is required by law to tell me how much something is going to cost me before they start work. Why is my doctor not held to the same standard. Ever tried calling a provider to find out how much something is going to cost? Sounds like the medical industry had better lobbyists.
Does that include a situation where say, when emptying out the oil, the nut over the drain breaks off which necessitates changing the oil sump, except they then discover the engine mounts are rusted and now the engine needs to be lifted and the mounts replaced? (I'm not a car guy, but I hope this demonstrates the thought even if inaccurate)