You'd be surprised at how many people buy tires from the dealers. After all, many people do not have time or want to spend more time taking the car to multiple places to get the work done.

Your assertion that NOT rotating tires makes them last longer is generally false for most cars. Cupping and uneven wear can cause parts of a tire to wear out long before the full tread wears off. These unevenly worn tires also have degraded handling characterisitcs. Every tire manufacture and automobile maker recommends tire rotation to extend tire life for vehicles that can support it. Obviously, cars with staggered tire sizes cannot easily take advantage of tire rotation without dismounting the tires and swappign left to right. However, this only applies to directional or symmetrical tread designs and not asymetrical treads. The former have an arrow to designate the rotation of the tire and the latter have the word OUTSIDE stamped on them.

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2004 (05/04 build) X5 4.4i - Silver/Black - Premium Package, Sport PAckage, Rear Climate Package, 19" Wheels, Navigation, Park Distance Control