Check the depth yourself before you jump and buy new tires. Any dealerships that I've ever been to tend to give some pretty bogus measurements.

Mine said that I had 2/32" on my last visit. I measured them myself and I had 2/32" on one groove, but I actually had 5 to 7/32" on most of the grooves.

Had a dealer tell me that my battery needed replacing and I drove for well over a year before I replaced it.

I always go with the least depth too. My central tread is always better than the edges.

The majority of it is how you drive. I can take my kart out and go down to the cords in 25 laps. And that's not trying to abuse them-just poor driving. If I'm smooth, I'll get 100-150 laps out of them.

not sure about the tire situation but when i worked at the dealership, the battery testers they use are either not very accurate or have ESP in predicting batteries about to go dead. 9 times out of 10 they are right but every once in a while they are wrong. i'm not sure exactly what they use to gauge it but if it says the battery is faulty, it usually is. sounds like you were the 1/10 possibility in that case :P

Just one word, Benjamin. Michelin (Pilot Super Sports)

I know - it is more than one word, but who gets the dorky reference.