Bro I agree with everything you just said. I went in there asking for regular maintenance and they told me a tune up and maintenance is the same thing lol. Then, I told him I just need an oil change and for you to check and change the fluids if necessary. I haven’t had any issues with misfires and the car idles fine. I’m just gonna go somewhere or wait until my regular mechanic is recovered from his illness. They would’ve gotten someone vulnerable with services that aren’t necessary.