The men that work here are nice and explain everything in detail.. To their knowledge. That doesn't always mean it's correct. They simply follow your manufacturer recommendations (which if you open your car manual will tell you exactly the same)
This chain should only be used for oil changes when your mechanic isn't readily available. Don't fall for their fierce sales tactics. Just say no. It's that simple.
I personally only come here for the free wiper blades (when they have the special). $50 (taxes in) for an oil change and 2 Michelin wiper blades is a pretty decent deal in my books. But besides that, my mechanic gets the rest of my service.