Porsche IManual says different. Clean the bolts/studs, no lube on lug nuts.
http://www.google.com/url?sa=t&rct=j&a..._ADI2YTSBTPrYUQ My question is, are the torque values given in the manual for dry torque or wet?
Following is from one of the searches. By the way, half of the searches for torqueing lug bolts/nuts has you lube them, other half no lube.
When applying torque to a dry bolt more friction is created than applying torque to a wet bolt with oil or other automotive fluids on the threads. With less friction (wet threads), the bolt will stretch more before a torque wench will click. Because friction is such a big factor in bolt torque, it is important to know the difference between applying torque to a dry bolt and a wet bolt. Using oil, anti-seize or other types of thread lubricant is a common practice, but an understanding that wet threads require less torque than dry threads because of friction is very important. Since every type of lubricant has a different loss of friction coefficient, it is recommended that every technician own a chart showing how much to reduce the torque when using different bolts and lubricants.
I wonder how many torques I have applied incorrectly. I always use lube of some kind.
Tom