I'm pretty sure Porsche is suggesting an anti-seize and not an oil/grease on the lug bolts. Something similar to the anti-seize that's applied on spark plugs..
__________________
'99 Porsche Boxster 986 - weekend car
'04 BMW 645ci e63 - daily driver
'98 BMW 528i e39 - dog carrier
Guess I'm anal retentive. When I get back from the tire shop I always loosen every lug nut and then tighten it with the torque wrench. Then, about once a month I check them again with the torque wrench.
Same here. Plus I insist that they hand torque, rather than use the air wrench.
I've used Permatex anti-seize for years. It's a compound of aluminum and copper. Don't know about "optimoly TA", but I get the Pematex at O'Reilly's. It's also available online.