The torque spec for the lug bolt on a given application is 80lb or 90lb or 100lb, etc. not 80-100lb. Conveniently choosing the high and low ends of two different ranges using creative math to support some claim you made is disingenuous at best. If you don't know why that is then you have no place working on someone's car much less charging them for it. Using similar methodology with the same set of numbers to prove a different point you could say that the spec goes from 100lb-ft to 60lb-ft and is 40% less for lubed fasteners which could potentially be equally if not more unsafe.

And this is independent of whether anti-seize affects torque specs or not.

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