Napa carries it or will order it for you. Comes in 5 gal jugs for ~$40.

Valvoline #538 , GL4 , 80W-90 Gear Lube

I told them I needed GL4 and of course they said GL5 would work. I
insisted that VW specified GL4. They looked in their lubricants book for
something to sell me and under this #538 it actually said  in the book
"Approved for VW" or something similar. I ordered 2 jugs, had it the
next day.

Mark

Brian Spisak wrote:
>
> So where the heck do you get GL-4 oil that aint RedLine (or some other
> synthetic)????
>
> ----- Original Message -----
> From: "wb6otg" <wb6otg@INTREX.NET>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Wednesday, October 23, 2002 12:46 PM
> Subject: Re: Size of allen wrench for final drive?
>
> > >Also, the modern GL-5 and 6 oils do not have the
> > >compatibility problems with the Brass. The reason VW still calls for
> > >GL-4 is due to the friction characteristics for the syncros to work.
> >
> > How about oils marked GL-4/GL-5?  I assume they are OK.
> >
> > Bill
> >