I've just come across a case of a Mazda van with all the wheel studs
> on the near side having left-hand threads. All the offside studs are
> normal thread. How unusual is this? BTW there is no mention of this
> in the Owner's Manual.
OK, on a 19 year old post, this is a very long shot, but do you still have that owners manual? I have just bought a 1991 Mazda van and struggling to find one! Many thanks.