What's the most fuel efficent way to drive up a hill?

I'm trying to win a little bet I made with my inner voice. I drive an automatic.

I know cars are more efficent in higher gears, especially on flat roads. When driving, I always try and keep the RPM low.

However, I have to drive up and down a 2 mile hill every time I go home and it really eats away at my gas.

I'm trying to win a little bet I made with my inner voice. I drive an automatic.

I know cars are more efficent in higher gears, especially on flat roads. When driving, I always try and keep the RPM low.

However, I have to drive up and down a 2 mile hill every time I go home and it really eats away at my gas. It's a 45 mph road, but to keep the RPM low, I average about 35 mph.

Most people end up passing me, going much faster, regardless of their vehicle type (except for trucks that go slower).

Other answer:

Superâ„¢:
Hills eat up gas no matter what but you get most of it back going back down. Do not over think it. Just keep up with traffic.

The problem with keeping RPM low is that you are not in the best power range and the extras time you take going up the hill eats up any gas you save and more.

For safety, go with the speed traffic flows at. Safety comes first.

Myself, I live in British Columbia, and we have tons of hills and we just do not worry about it.

DR + Mrs Bears face:
Hi If only this was so simple however depending on the engine size will effect the engine speed and which gear it is in. making an engine struggle is far worse than screaming it's nuts off actually. as making an engine struggle wears it out quicker as it shaves more metal off the cylinder walls.
Bill:
Driving slower uphill does use less gas. Most cars since 2000 can display the miles per gallon on the dashboard.
Steve S:
for the engine to make the required torque it needs to be up the revs it will chew fuel there wont be much difference in fuel use between 35 and 45 for 2 miles