30 years ago I had an oil change franchise (don't remember the name) in south Texas, change the oil and do a tune up on our S10 Blazer (a couple years before we acquired our first old car). I was still a trainee, we were living in an apartment, no garage, just a parking space, and I think I had maybe a screwdriver and a Crescent wrench for tools - moral of the story being that I couldn't do it myself. They changed the oil all right, but couldn't get it to run after their tune-up. I had to fix it on their shop floor - they had put all the plug wires in wrong. So, 6 hours later, (all of which they charged me labor for), with the missus and shiny new daughter wailing about how late I was (cold dinner, etc.), I wandered back into the house. No cell phones then, and the shop wouldn't let me call the house without charging me. Next day I went to Sears, got a basic mechanic tool set, (which I still have), and haven't let a shop do any of our routine maintenance since. Our son works in the auto maintenance industry, I know most shops take great pains to do the jobs right. None of the places he's ever worked has messed anything up. But there are still bonehead techs and butthead managers out there. Luckily, where we are now all the shops live primarily on their local reputation, even the franchises and dealerships (what few there are). A sloppy tech or bad manager doesn't last long, if they do, that shop withers and dies.