26MPG is huge from a mini van. Not to steal your thunder but 3weeks back when I drove upto canada in my car, which is a '94 Mazda Mx6 with 104000miles on it, driving at 60-65mph continuously..it gave me 39.6MPG..yes thats true
From a 2litre engine that's 13 yrs old and considerable mileage on it..I was amazed !