Don't most other locking gascaps just go on in a normal manner?  Like your
radiator cap?  Put them into the slots, then make a quarter turn with the
whole cap, then lock it in place?  I've had other vehicles with external gas
fillers and locking caps, and that is the way they all worked.  Most, you
can even put the cap on without locking it, should you choose to.  Seems
like a better idea and maybe that is what confuses 'Non-VW savvy' gas
jockeys.
  My 84 frequently  'splooges' a couple of ozs. of gas as the pump
auto-valve activates, too.  I recall seeing something about how to fix that
but I didn't pay attention.
  Don Hanson

On Sat, Aug 15, 2009 at 5:35 AM, Allan Streib <streib@cs.indiana.edu> wrote:

> Mike <mbucchino@CHARTER.NET> writes:
>
> >   Mine is the same.  It's the best system I've seen yet, to prevent
> >  gascap loss.  Incidentally, the VW key guy at the last show was
> >  cutting me a new key and told me that VW never made a gascap that
> >  used the ignition/ door key; it was 'always' a smaller, different
> >  key.  I told him he's wrong about that, but he refused to believe
> >  me. He thinks it can't be a original gascap, but mine definitely is.
> >  Between the two of us (and more?), I wonder if he can be convinced
> >  otherwise?
>
> Hm.  Now that you mention it... my '91 Jetta used the ignition key as
> the gas cap key, but my '91 Vanagon has a separate smaller key.  I have
> no idea whether it's the original cap, however.
>
> Allan
> --
> 1991 Vanagon GL
>