Cruise Control

[GOG]

Is it known whether Cruise Control is, in general and ignoring any subtle
driving techniques, more or less or equally, thirsty?

Interested. The price of petrol, you know.

GOG

[Peter]

On a long level run it probably helps a bit, but if there are a lot of
ups and downs it worsens fuel use a bit as it forces power to maintain
speed on the ups and goes onto overrun braking on the downs, whereas a
manual (pedal?) driver eases speed on the hills and recovers it on the dips