Every manufacturer is going to tell you not to use wheel spacers for legal reasons. They'll even tell you not to use aftermarket wheels. It doesn't mean much, they just need to cover their ***es. I'm not looking for a "wheel spacers aren't safe" debate. If you have appropriate length wheel studs, there is virtually no difference between running a properly manufactured wheel spacer vs. having a wheel with a 10mm more aggressive offset.
I was simple asking if anyone knew if there were enough threads on the stock wheel studs to safely use a 10mm spacer because I don't have a car to measure yet.