OK to lube wheel bolt cones?
 

Recently I had to unbolt some wheels on my 2000 S and I had a tough time. I don't think the actual torque was excessive but there seemed to be a lot of friction at the spinning cone part of the bolt. I couldn't really tell if was the cone-to-wheel contact or the cone-to-bolt head. I want to lube this area on all the wheel bolts but I thought I better check first. Somewhere I remember reading that antiseize on wheel bolt threads was wrong and that they are supposed to be dry. What about the cone area?

Porsche says do not lube "cone" to wheel contact area. I believe the purpose of the cone is to reduce friction between the lug bolt & wheel surface. I use a thin coat of anti-sieze on all lug bolts/studs & if I had the problem you do I would lube under the bolt head also. Basically you want the "cone" to not move & the bolt to be low friction for a true torque reading. I drop my install torque to 90 ft.lbs. due to the reduced friction.

I use a few drops of oil on lug nuts/bolts, it doesn't change the friction and resulting torque as much. Nothing between the cone and wheel.