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The 1600 info taken from a contemporary brochure gives cruising consumption as 34mpg (imp), and that is indeed what my 71 Variant has always done on a journey at speeds around 60mph, even full of camping gear. Maybe it is time to measure the displacement (somehow!). Something is over-fueling the engine if it's persistently running rich, and you've had the heads off so you would have noticed damaged valves etc. Have the carbs still got stock main jets? (unlikely there's a problem here if the other carbs have behaved the same). How do you estimate consumption - running total of miles and gallons over some months/2000 miles eg? 22mpg (imp) on fairly short urban journeys may not be excessive; a drop of 10% to 20% isn't that unusual, as the published urban and cruising mpgs quoted in brochures for modern cars show. Dave. UK VW Type 3 & 4 Club http://www.hallvw.clara.co.uk/ ------ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org