The most honest mechanic I’ve used is Fritz’s Car Care. There have been occasions when I was convinced my car needed an expensive repair (sometimes after having been told that by another mechanic) and Fritz told me it was a simple, inexpensive fix. It got to the point that I told him to fix everything that made sense, and he would still call before fixing it to to discuss with me the things that need to be fixed right away and those that could wait. He once even told me to stop bringing one of my cars to him because it wasn’t worth fixing anymore, even though he could have continued to repair it and get paid. Definitely a stand-up guy.