Comments on: 55 MPH = Optimal Fuel Efficiency

By: Mark

Mark — Thu, 18 Jan 2007 00:01:14 +0000

Wow, I guess I’m a baddie when it comes to fuel efficiency – I usually average 110mph on the highway, lol.

P.S. – that’s because my pos car can’t really go any faster than that

By: andy

andy — Wed, 17 Jan 2007 07:37:22 +0000

I drive a 2006 Ford Fusion. My experience has been that faster highway speeds get me better mileage – for example, driving from Denver to Fort Collins on I-25, doing around 75MPH, got me 32MPG. As that is the high end of where my car is rated, I can’t see 55MPH going much over that, although I might have to test it next time. If it turns out to be a 0.4 MPG difference, well, I think I can sacrifice some fuel to end up at my destination 10 minutes earlier.

Within the city, I get between 22-24 MPG, but that’s primarily due to the stop and go nature of city driving, so I can’t really compare that.

By: Yan

Yan — Wed, 17 Jan 2007 05:53:39 +0000

It is the most optimal speed unless you are driving over the speed limit.

The heading really sounds like everyone should be driving 55mph

By: 1mil

1mil — Wed, 17 Jan 2007 02:13:17 +0000

Is that why there are all those slow pokes in the fast lane? They should have auto-destruct segmens of the highway that explode if youre not going a minimal speed. Wait um, no. hehe. Just get a hybrid i say!

your friend in finance and gas efficiency,
1mil from millionster.com

By: jim

jim — Tue, 16 Jan 2007 03:16:41 +0000

True, but how often do read about a regular old joe strap a gizmo onto their engine to get some good specific data? Also, I have a pretty good intuitive understanding of how planes fly but that doesn’t make me a pilot – it’s easy to be dismissive of others.

By: Matthew

Matthew — Tue, 16 Jan 2007 01:47:53 +0000

There’s nothing really magical about 55 MPH. Since aerodynamic drag scales with the square of velocity, then operating at the lowest RPM in your vehicle’s highest gear is going to yield the most efficient fuel consumption.

Anyone who has ever ridden a bicycle for any considerable distance probably has an intuitive understanding of this idea already.

By: samerwriter

samerwriter — Tue, 16 Jan 2007 01:24:20 +0000

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Well, it’s probably not right to say “how to best take advantage”, but it’s the best way I can figure out how to take advantage of them anyway…