Valvoline Instant Oil Change

I’ve gone here for oil changes for more than a year. Super friendly and courteous. Fast too. I felt like they were doing a decent job. Valvoline developed a long checklist they perform each time as a quality assurance check. I went here for fast during-​the-​week changes (about 1 in 8 times) and to my dealer for weekend changes when I had the time.
I noticed that when I went to the dealer the oil change seemed to last «longer». It seemed that I didn’t need to add oil in between changes. I couldn’t understand this because they always showed me the dip stick and oil showing it was full. Still not sure that there’s anything to this, but I thought it was odd.
Along comes my last oil change with them. Noticed oil puddles in the garage, driveway and thought «oh no» as my car has 147,000 miles on it. I figured it might be time to trade in my car, but was hoping for 200,000 miles since I service it regularly. Sooooo, I take it into the dealer and the cause was a cross-​threaded oil pan drain plug. Ouch, but not too bad of an ouch. $ 209 to pull the plug, drain the oil, re-​tap the oil pan, replace the plug, and replace the oil. So that takes my $ 70 full synthetic oil change here to $ 279 for the damage repair and replacement of oil.
Lesson learned. Rapid, low cost and handy location doesn’t add up to a good value. I think I’ll stick with the dealer from now on.