Could be the oil.  I had the same problem with mobil oil years ago.
BUT get the cheap Fram filter of there.

            Eric                   86-VW4x4
            vw4x4@fyi.net          86-SS Syncro
            Pittsburgh, PA USA     1936-Chrysler
                                   92-Jetta GWC
            www.fyi.net/~vw4x4/vw4x4.htm

On Sun, 28 Dec 2003, Jere Hawn wrote:

> Hi All,
>
>
>
> I changed the oil and filter in Digi-wife's 88 GL and after a little use and
> some freeway driving the oil light would come on and the buzzer would go
> off...panic!!!!
>
>
>
> I had just used the Techno Oil 20-50 from Wal-mart (cheap stuff) and a fram
> filter.  I changed the oil back to my favorite Castrol 20-50 and the oil
> light and buzzer have yet to come on.  I suspect the Techno Oil is just too
> cheap.
>
>
>
> Jere
>
> 90 GL/Carat-a-version
>
> 88 GL
>