After 5 tanks of gas (with me as owner) I've averaged the following
for a 91 Syncro Westfalia running Webber two barrel progressive
Carbs, and premium pertrol:

Overall:  12.6 L/100 km  = about 19 MPG

City:  13.5 L/100km  = about 18 MPG

Highway:  11.1 L/100  =  about 21 MPG

This represents a little better than other Syncro Westys, in my
MPG survey a few months ago.  These results are closer to straignt
2WD.  My engine has about 50,000 Kms on a factory new engine and, as
I said, I run premium petrol.

Many of you may know the story, those interested in the "why" etc.
can check the archives under my name or "Carbs to FI " or "Carbs to
EFI"

Please, I don't want to start the discussion about EFI vs Carbs,  I
post this to the list for anyone's information.  So far it seems to
be an acceptable alternative for ME!  I again caution that the
emisions will probably NOT pass in places with laws on the subject.

Malcolm S. (in the days of CB 'handles', maybe I could be known as
"Downdraft" :-)