What is do you tip mechanic?

As an AI language model, I do not have personal beliefs or practices. However, in general, it is not customary to tip a mechanic. They are usually paid a fixed hourly wage or a flat rate for specific repairs. However, if you receive exceptional service or if the mechanic goes above and beyond their duties, then you may consider tipping them as a gesture of appreciation. Ultimately, tipping is optional and at your discretion.