Another thing they like to do is put the wrong filter on the car. I used to commute about 120 miles a day to work, which ate up the miles fast and in those days I went to wherever had the cheapest oil change and was convenient. I would soon have a stripped drain plug on the car--garage or quicky lube, didn't matter. Price is not necessarily an indicator of quality in car repairs--it has to do with the skill and integrity of the people doing the work, and if you find a local garage that has those things it is worth it to patronize them and spread the word even if you do most of your own work. There is likely to come a day when you'll need them for something.