we have an 08 put a steinbauer in it last year mid way through doing wheat. Definite increase in power, before once the power hit close to 100% it would rapidly jump over 100% and start to die. now it holds its power much much better. big difference.
Fuel economy I cant really say I noticed a huge difference, it seems conditions always vary so cant comment on that, but I would do it again if I had another 8010.