I took in my corolla for an oil change today, and the mechanic pointed out> to me that one of the rear tires was cupping (more and less worn out> segments of the tire were alternating every 5 inches or so around the > whole> tire). He said, without really inspecting anything that the strut(s) need> to be replaced, and it will be around $600 if I replace all 4 of them.>

Now, I'm generally suspicious of auto mechanics, especially if they speak> with barely comprehensible Arabic accent and work at a measly gas station> while driving around in an expensive looking black Mercedes.