Mr. Lube - Caution and Beware Consumers !!!

About 2 months ago, I went to a local Mr. Lube for a standard oil change, now I am very frugal so I even went in with one their coupons. I own a 2003 Jeep Grand Cherokee with about 240 km on it. I spoke with the main oil technician and advised him I only wanted an oil change nothing else at all especially coming in with a coupon. They offered me coffee and a newspaper, so I took the newspaper. I started reading my e-mails from my phone and the technician approached me and told me that he did an engine flush because  the oil was black. I said why would you do that without asking me because I knew that an engine flush would ruin my car. So sure enough, it did. There is a build up that my car was used to for the past ten years, without that buildup everything is that my vehicle is used to is now gone and it has been costing me tons in repairs. So be careful not only at Mr. Lube but any establishment that does oil changes. Make sure you don't pay if they do something without your permission because now I am stuck, it is my word against the oil technicians. Some places are infamous for offering products that you do not need. I was also offered for my brake lights to be changed. My windshield wipers were in horrible condition but yet they said nothing about them. The problem is that they are not mechanics,for the most part. They are mainly trained to do flushes and oil changes. So buyer beware !!!