I have centre lock alloys on my Plus 8.
When I purchased it the wheel nuts were particularly difficult to remove, probably due to lack of maintenance and heavy-handed over tightening.
Whenever I remove and refit the wheels I always smear the tapered faces with Moly Copaslip grease and torque the nuts up to 160 foot pounds. When I tighten the wheels, I also make a point of supporting the end of the socket with the scissor jack, so that all of the force pushing down on the torque wrench goes into rotating the nut and not chewing the hexagonal corners off.
As an extra precaution, I also mark the nuts against the wheels with a spot of Tippex, just as an indicator to confirm no subsequent movement.
I have followed this practice for over 3 years now and not had any further problems with removal.
