The most valuable thing we do for a Hyundai owner with an engine noise costs nothing: we check the VIN against open recalls and manufacturer campaigns before quoting anything. Several Hyundai engine issues have been covered by programs with extended coverage, and a shop that goes straight to an estimate can cost you thousands you never needed to spend.
If it is covered, we will tell you to go to the dealer and we will explain what to say. That is a job we lose on purpose, and it is the right call.
Where it is not covered, the diagnosis still has to be real. An engine knock is not automatically a rebuild, and oil consumption is not automatically a failure. We measure, document and then talk about options with a number in hand.