What driving speed is efficient?
I'd like to ask, at what speeds do you all cruise at on the highway?
How do we determine which speed is the most fuel efficient for our car? E.g. on flat straight roads for my car, 90kph @ 3100 rpm is the optimal point (according to the manual).
However, what about inclined roads and corners? Can we refer to the rpm of engine?
This is related to the CE Earth Initiative thread. Though I put the question separately for better visibility 😉