Cruise Control

10 messages, Last post on Oct 08, 2008 at 5:55 AM

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#9 of 10 cruise control and fuel efficiency by jmosby1469 Oct 06, 2008 (3:35 pm)
The conventional wisdom that the use of cruise control helps improve fuel economy, by evening out the accelerations and decelerations involved in usual driving practices, has a flaw. I notice that using this feature on roads with varying terrains, including many hills, results in my RPM's increasing sharply as my vehicle ascends these hills. I believe these sudden sharp increases in my engine's output negates many benefits to fuel economy of keeping the cruise control set. Your comments, please. Replies to this message: jlflemmons (Oct 08, 2008 5:55 am)
#10 of 10 Re: cruise control and fuel efficiency [jmosby1469] by jlflemmons Oct 08, 2008 (5:55 am)
Replying to: jmosby1469 (Oct 06, 2008 3:35 pm) You are correct. Cruise control is not effective for fuel economy in rolling terrain as it cannot "look ahead" and compensate. Nor can it "average" such as letting the car gain a few MPH leading up to a hill, or drop a few extra MPH while approaching the crown of a hill.