Here is some results of european tire test of this year which I have read:
At the moment best tire on the market is Michelin Energy saver, best in RR in every test! And usually orher michelin models are also in good positions in LRR tests
. One test shows consumption difference between models in litres in different speeds.
speed 80km/h 120 km/h
1 Michelin energy saver 5,44l/100km 8,09l
2 Michelin Primacy Hp 5,6 8,2
3 Kumho ecsta spt 5,55 8,26
Other low RR tires in the top 3 test are
Continental premiun contact 2
Hankook vetus prime k105
Nokian V
European manufactures usually use in their eco models 175/70/R14 tire size...