Stormin Mormon wrote:
I did that a couple vehicles ago, changing shocks. The breaker bar
sheared off the bolt, and an impact wrench loosened the bolt. Ah,
well.
....

Oh, that's easy enough for a Grade-5, probably no more than 5/16" or
3/8" bolt -- probably better off to replace it, anyway.

My point was simply that a Grade-8 lug bolt is pretty formidable to
shear w/ no more than an ordinary 1/2" breakover bar unless it already
had a stress-fracture or had been over-torqued w/ the aforementioned
tire-shop zealot w/ his impact wrench...