[D15r]

I get what you guys are saying, but I still think it is situational in the real world to get the best fe numbers.

As an example sometimes i coast down a hill on to a flat then reach another down hill, could be a tiny gradient, at which point ive dropped below an acceptable speed so i accelerate to a speed which will suit the next coming climb...speed limits, traffic etc. SO your saying i should be waiting for the up hill to gain speed? But Many hill where I am will barely allow me to accelerate from my efficient climb speed without a downshift or 2.

Please note that I am saying that I prefer to maintain my speed up a 'hill' this would mean I reach the top without losing momenteum.

I know that in rolling country side, uphill down hill I can get better mpg in my car, and by that theory given the inefficiencies of the car engine then there should be a wieght which is optimum for the car which won't be the lowest right?

Please note I get what is being said about efficiencies although obviously my so i'm not arguing the theory just discussing the practicality.