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[Nubo]

I have never had a shop torque lug nuts to the proper values.

You are going to the wrong shops, apparently. My Discount Tire store always uses a torque stick on their impact drivers with a setting below the maximum for the car when mounting tires, and follows that up with a hand torque wrench set to the exact spec. This is exactly the same procedure I use when mounting my own wheels on my cars.

TT

Apparently so. Typically they would over-torque with the impact wrench though I've also had some under-torqued.

But in any case, DIY wheel rotation is pretty simple, costs nothing, you can get the torque exactly right, and it gives you an opportunity to inspect tires, brakes, rotors, shocks, joints and boots.