fuel efficient 4wd and fuel efficient 6 or 7 passenger vehicles

Several people have asked me variations on these questions over the last few weeks: (1) what are the most fuel efficient 4 wheel drive vehicles? (2) what are the most fuel efficient 6 or 7 passenger vehicles? and (3) what is the overlap of these two sets?

As a corollary to my wagon listing (LINK) here are the answers, best as I can figure them out (with help from the EPA fuel economy website).

First, the most fuel efficient 4 wheel drive vehicles, in descending order with the combined fuel economy number first, then city, the highway:

29/30/28 Lexus RX450h Hybrid
29/30/27 Ford Escape, Mercury Mariner, Mazda Tribute Hybrids (triplet vehicles with different badges)
26/27/25 Toyota Highlander Hybrid
25/23/29 Suzuki SX4 (variable auto)
26/23/31 Subaru Legacy Sedan (variable auto)
25/23/28 Jeep Compass and Patriot (manual)
25/22/30 Audi A4 and A5 (manual)

25/22/30 Suzuki SX4 (manual)

24/22/29 Subaru Outback Wagon (variable auto)
24/21/29 Audi TT
24/21/28 Audi A3 (gas, auto)
24/21/27 Toyota Rav4 4cyl
23/20/28 Toyota Venza 4cyl
(I've skipped a whole bunch that won't count for the overlapping set)

22/19/26 BMW X5 Diesel

20/18/24 Mercedes-Benz R350 Bluetec Diesel

20/17/25 Audi Q7 Diesel

Second, the most fuel efficient vehicles that can seat more than 5, in descending order with the combined fuel economy number first, then city, the highway:

26/27/25 Toyota Highlander Hybrid

24/22/28 Mazda5 (manual)
24/21/27 Toyota Rav4 4cyl
23/21/27 Mazda5 (auto)
22/20/27 Kia Rondo 4cyl
22/19/26 Toyota Sienna 4cyl (estimate)
22/19/26 BMW X5 Diesel
21/18/26 Kia Rondo 6cyl
20/18/24 Mercedes-Benz R350 Bluetec Diesel
20/17/25 Audi Q7 Diesel
20/17/25 Honda Odyssey (variable cylinder management version)

Third, the overlapping set:

Image via Wikipedia

26/27/25 Toyota Highlander Hybrid
24/21/27 Toyota Rav4 4cyl
22/19/26 BMW X5 Diesel
20/18/24 Mercedes-Benz R350 Bluetec Diesel
20/17/25 Audi Q7 Diesel