Pep Boys, Wal Mart, Jiffy Lube? They all stink!
Three different Peb Boys stores got caught three times stealing my synthetic and trying to put in the bulk oil.
Wal Mart left a wrench or some tool under the hood which then fell into the belts and did $1300.00 in damage. After 6 months of claim processing with Wal Mart, they told me if I could go across the country to the road where the car broke down and found the tool then they would honor the claim.
Jiffy Lube tried to use a Chevy drain plug in my BMW alloy oil pan. Why? I can't even guess. I had to take them to Better Business Bureau and arbitration...they fought me really hard, but I won, after 6 months.
I still use Pep Boys and Wal Mart sometimes, because they have a wide selection of oils and they are easy to find when traveling.
But I talk to the service manager first and decide if he or she runs a good operation and I ask for their most trusted tech to do the job. I often tip the tech. And I watch every step of the oil change.
It is easier and safer to change my own oil, but there are many reasons why it is not always feasible to do so.