Driving up and down hills. Bad for fuel economy?

[Cool Box]

Or do you save on the downhill sections the extra fuel you use going up?

[Raize]

Bad for fuel economy compared to travelling on the flat. You don't "regenerate" fuel on the downhill.

[TameRacingDriver]

Never tested this with any accuracy but from my personal experience (I live in a hilly area), I do think that going up and down hills ultimately reduces fuel economy versus being on a flat. You do save when going down (sometimes using none if not using any throttle) but I think you use a hell of a lot going up them.

[Cool Box]

That's what I'd have thought too but it's not easy to check.

Considering how hard it is to pedal a bike uphill it's not surprising.