Could be something simple, like an oil leak at the dipstick.
My Westy does this too, but passes compression tests.
It does have a small oil leak.

I'd do a compression and leakdown test before deciding that it was 'blow-by.'

Todd
'88 Westy

 -------------- Original message ----------------------
From: Janet Sanford <sanfordchef@COX.NET>
> Okay my 88 wolfsburg weekender has black spots all over the back from what I
> have been told is "blow by."
>
> Does that mean I need a new engine?
>
> I am trying to decide whether to just find another or get this one fixed.
>
> I also have some body damage, but before I trade my great beach car in, I wanted
> the wise advice of the list.
>
> thanks,
>
> janet
> 86GL
> 88Wolfsburg Weekender