no man its not true if you put your bike in 5th gear then it is better for fuel eco becuz in old delux you are at the speed of 100 km/h and your rpm is 8000 means piston is rounding 8000 per min and more fuel is going to the engien alright and
if you put it on 5th gear then at 100km/h its rpm is 7000 means piston is rounding 7000 per min and less fuel is need than the previous one NOW I THINK ALL CAN UNDERSTAND THIS THING THAT 2010 DELUX IS MORE ECO THAN THE PREVIOUS ONE