Malcolm, evidently you are the seer of the list.  First the fridge link,
now this.  Your figures are pretty much in line with what I saw before my
conversion.  I've been seeing about 21 mpg city, 27 highway (17.5/22.5 US)
with the new engine...just trying to see how that compares with other auto
Westfalias.  And yes, it's worse when it's cold.