This is from my experience:
http://www.salicos.com/FillTubeSleeve.htm

> >-----Original Message-----
> >From: Vanagon Mailing List
> >[mailto:vanagon@gerry.vanagon.com] On Behalf Of Keith Ovregaard
> >Sent: Sunday, July 01, 2007 8:21 AM
> >To: vanagon@GERRY.VANAGON.COM
> >Subject: Re: vanagon Digest - 30 Jun 2007 (#2007-666)
> >
> >My Syncro takes gas as fast as the pump will deliver it, up
> >until the last 2 1/2 gallons, that is. Then it's
> >click-and-trickle time if I want a full tank. What a PITA!
> >Anyone try to fix that problem with a bigger breather hose
> >or something?
> >
> >Keith O
> >
> >
> >
> >On Jun 30, 2007, at 9:00 PM, Automatic digest processor wrote:
> >
> >> Date:    Sat, 30 Jun 2007 19:33:17 -0700
> >> From:    KIM BRENNAN <kimbrennan@MAC.COM>
> >> Subject: Re: At the pump ...
> >>
> >> In Canada some stations are full service (aka they insist
> >on pumping
> >> gas) and some are self service. Whenever I pull up in my
> >Syncro I ask
> >> if they've ever filled up a Syncro. They never have. After they
> >> futilely try to pump gas in (and the auto-shufoff kills it
> >instantly)
> >> they let me fill it up. Most modern pumps pump gas so fast that it
> >> will always trigger the auto-shut off (now super sensitive
> >to prevent
> >> overflows) on my Syncro Westy.
> >>
> >> I get to spend 15 minutes of my time instead trickling the
> >gas in to
> >> the tank.
> >
> >