My '94 twin turbo only got 13-14 MPG in combined city/highway driving with very little use of boost. I never figured out the reason for the low mileage.... even after several retunes for higher mileage. But then I don't know the reason for burning a quart of oil every 350 miles. The engine is currently being rebuilt by another builder. Hope that cures the oil and fuel consumption problems.
With the wide range of fuel consumption, it would be interesting to know if the motors were built and who built them. I'll be the first. My motor was built to 3.2 liter by Factor X with 93mm Darton sleeves and Weisco pistons, with stock: cams, rods and crank.
Hrant, I'm looking forward to hearing if your mileage improves.
