Summer tires 2011 finnish (TM magazine) LRR results for size: 205/55R16:
Michelin was the best and those % number are the difference in fuel consumption. So the worst tire consumes 6,8% more fuel than the best.
MIchelin energy saver 0%
Goodyear efficientgrip 0.1%
bf goodrich g-grip 0,9%
Nokian hakka green 0.9%
barum bravuris 2 1,5%
continental contipremiuncontact 2 1,7%
Vredestein sprottrac 3 2,1%
Pirelli cinturato p7 2,8%
Sunny sn3630 3,9%
Hankook ventus prime 2 4,0%
Bridgestone turanza er 300 ecopia 4,4%
Linglong green max 4,5%
Nokian Hakka V 4,7%
Dunlop sp sport fastresponse 6,2%
Sava intense hp 6,8%
If you like to take a look at the full test it can dowloaded here in finnish:
Vertailu - Kesarenkaat 2011.pdf
Overall winner of that test was continental contipremiuncontact 2.