>> Hmmm. Why wouldn't you grease your lug nuts?
>>
>
>Yeah.  Same question I asked.

The wheel nuts on my 57, 66 & 75 vans were all prone to seize; once I bent
the brace 180 degrees loosening one. And no, I wasn't overtightening them.
Now I always use Coppercoat,a grease with copper particles in it, to keep
things unseized. Wonderful stuff. In USA this sort of material may go under
a different name, I don't know, Use it on exhaust studs etc too!