Is Cruise Control more economical than a light right foot?
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Thread: Is Cruise Control more economical than a light right foot?

  1. #1
    Regular Saab Guy DanKlitzke's Avatar
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    Is Cruise Control more economical than a light right foot?

    With the rocketing price of fuel (diesel in my case), I was wondering what everyone's opinion was on cruise control. I tend to set mine at 75mph on the motorway and the SID reads around 42 to 43 mpg. I have found that driving with a gentle right foot without the CC on and varying the speed +/- 5mph with 75mph as the average seems to return better figures. Has anyone else found this or is running with the CC on the most economical way to drive on the motorway?

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  3. #2
    Full throttle
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    Re: Is Cruise Control more economical than a light right foot?

    If you're in charge you will anticipate the road ahead. The cruise cannot do that. So you can avoid acceleration just before a corner, add a bit of speed downhill so you can run up the hill afterwards etc.

    Also when you are comparing the two you will be consciously driving economically. The cruise only has one mode.

    Probably a more real testis to compare cruise with "normal" driving when you are not thinking about it.

  4. #3
    Saab Afficionado Zaphod Beeblebrox's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    I am by no means a heavy footed driver, but I have found that cruise on our former 9000, and now on the Swiftmobile, makes for an improvement in consumption of fuel on a run, 35+ @ 75. This is no cognitive dissonance!

    However, the real point of fitting cruise, IMHO, was for more relaxed driving, although it does make more sense when travelling in the US, or, off peak over here, when there's less stop start and general traffic about.

    HTH

  5. #4
    Full throttle john's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    Originally posted by Zaphod Beeblebrox:
    [qb]*This is no cognitive dissonance! [/qb][/b]
    eh You mean you can't see any difference.

    Cruise Control is not as efficient as a driver who is concentrating and driving efficiently and economically - but that is easier said than done. For most drivers, cruise control may be more efficient than their driving.

  6. #5
    Saab Afficionado Zaphod Beeblebrox's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    cognitive dissonance.

    For the unwashed, as referenced from a previous thread (with my psychologist's hat on.).

    HTH .

  7. #6
    Full throttle john's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    Originally posted by Zaphod Beeblebrox:
    [qb]For the unwashed, . [/qb][/b]
    Let's try and keep it friendly in this part of the galaxy. Elitism is not in the spirit of help and cooperation.

    Are you saying that cruise control is just as efficient as a careful driver?

  8. #7
    Saab Afficionado Zaphod Beeblebrox's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    Of course, no offence intended, or implied. (hence ) I am a humble postman, after all. (enough said )

    It is an interesting concept, which can be applied to a whole manner of things in daily life, when people try to justify their actions, typically when a football manager makes a bad signing and explains it away as, 'We think the boy will come good in the end' sort of thing. No doubt, everyone can think of similar examples.

    I believe that CC has economy benefits from my experience, and as indicated, it is not a question of construing or extenuating facts that are there to prove or fit one's belief.

    However, statistically, again in my experience, the gain is less than 5% in MPG (and,of course, 's at the pump) which does not make it statistically significant.

    More is to be gained by having a more relaxed journey, IMHO.

    HTH

  9. #8
    Regular Saab Guy DanKlitzke's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    Thanks Guys

    That wa pretty much my thought - on the commute around the M25 I reckon my light right foot is better but on a sunday night run with little traffic on the road, the ease of CC makes it worth the very slight premium.

  10. #9
    Full throttle john's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    OK, think I understand what you're saying now

    I think you made a point above about CC being more effective in the USA. I'd agree with this on my experience of our congested roads in the UK, short distances between settlements thus many road junctions mean that we are not really able to benefit from CC over long distances.

    I like to use CC when I can on long journeys but I find it all depends on the traffic conditions, just as Dan has identified.

  11. #10
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    Re: Is Cruise Control more economical than a light right foot?

    In my experience CC helps the economy a tad by stopping me going too fast. OK, I admit I probably set it to most people's view of "too fast" but it stops me going even faster! On my car it's quite gentle in the way it resumes speed after slowing down, whereas my manual approach is to boot the Finite Probability Drive back up to warp factor 10 cruising speed asap. I'm not at all impatient, no...

    And as for being less use in the UK, well I do 30K+ a year, mostly on UK motorways, and I use it as much as possible, which is quite a lot.

    Another benefit is it helps stop my right knee aching from holding the throttle too far from the floor for comfort on long journeys, my anatomy/shape/driving position seems to prefer foot on/close to the floor

  12. #11
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    Re: Is Cruise Control more economical than a light right foot?

    But I find that using the cruise makes my right knee ache as right foot has nothing to rest on at all.

  13. #12
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    Re: Is Cruise Control more economical than a light right foot?

    I stretch my right leg out a little under the pedal, lay it flat on the floor in front of the pedals, or rest it on the corner of the A-pillar & sill to change positions for while - seems to help reduce the aching I get after an hour or so.

  14. #13
    Regular Saab Guy DanKlitzke's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    I agree about the right knee. 4 hours of right foot on the throtle leaves me acheing so the CC is a blessing in that sense.

  15. #14
    Saab Afficionado Zaphod Beeblebrox's Avatar
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    Re: Is Cruise Control more economical than a light right foot?

    but it stops me going even faster![/b]
    There's also the benefit of setting at exactly the correct speed when going through, say, 10 miles of reduced speed due to roadworks on the M4, and hence avoiding the attentions of speed cameras.

    HTH

  16. #15
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    Re: Is Cruise Control more economical than a light right foot?

    I must admit that since fitting cruise on my gm900 vert (using the helpful guide on here), after driving without for 2 years, has made a big difference to my consumption with SID showing around 4mpg average saving. Like other posters, I find it stops me constantly accelerating everywhere (so easily done with stage 1!) and definitely makes for more relaxed driving

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