What do I say about why I left my last job? after 5 years as a mechanic

I have an interview next week and I am unsure how to explain why I left my last job as a mechanic. Thank you in advance. I have been practising in the mirror. Do they ask follow-ups?

Say it plainly and move on to what you can do. Interviewers usually move on if you do.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.