Grease or oil is completely changing how the torque and that stuff works. A joint works by stretching the bolt like a rubber band and the friction under the head and between the threads keeps it from slipping.
Greasing the threads reduces the friction which greatly magnifies the torque you can apply to the stud, which means you are stretching it much farther than designed. The lower friction in the threads also means it is easier to loosen or come off completely if it gets loose.
Biggest danger is work hardening and snapping the studs off.
I used to oil mine too before I learned all of this.
Never had a stud come lose and never broke one by overtightening. I don’t even use a torque wrench, i just use my foot to press on the wrench until it feels tight enough, but not stuck - i guess years of experience teach you where the sweet spot is. On the contrary, i am having trouble getting the studs off after occasionally taking the car to a service and they put the wheels on with a pneumatic gun, that’s why i avoid these guys as much as possible and change my own wheels.
I agree your theory is correct, but in practice things proved out to be easier and good enough for practical purposes.
Grease or oil is completely changing how the torque and that stuff works. A joint works by stretching the bolt like a rubber band and the friction under the head and between the threads keeps it from slipping.
Greasing the threads reduces the friction which greatly magnifies the torque you can apply to the stud, which means you are stretching it much farther than designed. The lower friction in the threads also means it is easier to loosen or come off completely if it gets loose.
Biggest danger is work hardening and snapping the studs off.
I used to oil mine too before I learned all of this.
Never had a stud come lose and never broke one by overtightening. I don’t even use a torque wrench, i just use my foot to press on the wrench until it feels tight enough, but not stuck - i guess years of experience teach you where the sweet spot is. On the contrary, i am having trouble getting the studs off after occasionally taking the car to a service and they put the wheels on with a pneumatic gun, that’s why i avoid these guys as much as possible and change my own wheels.
I agree your theory is correct, but in practice things proved out to be easier and good enough for practical purposes.