re: Taking a car to Firestone rather than the dealership.....

I bought a set off tires at Firestone at a Black Friday Sale. A year later I stopped in for a free rotate and balance only. They called me and said there are a couple of things that needed doing. Spark plugs, fuel system cleaning, coolant flush for only $750 . I had changed the spark plugs about a month prior. I asked how did you determine I needed spark plugs. He said you got 100K miles on the odometer. I said just rotate and balance the GD tires. He said OK then it's ready to be picked up.