Tires Worn already?

[07 flint mica]

I personally work in the auto industry. Sometimes tire rotations are sold when they are not necessary which wears out tires prematurely. If you stick to the auto industry standard (6,000 miles) you will achieve the best average tread life. For example: if Mr Jones comes in for a service at 3,000 miles (oil change tire rotation). after that he waits 3 months but only drives 1000 miles and then receives a letter/phone call from the dealer/repair facility that it is time for the next service (i.e. 12 month or 10,000 mile service). The customer comes in and performs the 10,000 mile service 4,000 miles to early. if this trend continues his tires will be worn out before 20,000 miles