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  3. CPians and Fuel Efficent Cars ?

CPians and Fuel Efficent Cars ?

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  • M Mike Dimmick

    Toyota Prius, getting approx 60mpg (imperial) at present indicated on the multi-function display. Reportedly this can be a bit inaccurate, but when I last refuelled I'd done 453 miles since last fuel and the pump reported 33.49 litres distributed when it cut off. That works out at 61.5mpg. (I'm refuelling with two blobs out of ten left on the fuel gauge, as the manual says that the fuel pump will struggle with less than 25% in the tank, as the fuel pump is cooled by being immersed in the fuel.) The Prius, in the US at least, has a resin bladder to contain the fuel, whose capacity changes according to temperature. This helps to prevent fuel evaporating in the tank. I'm not actually sure if the UK model has this feature - some commenters say no. The fact that the capacity changes makes measuring how much fuel you used quite tricky. Performance - it has no step gears, being an 'electric CVT', so you don't lose any time changing gears. The car can keep the engine turning at peak torque and apply the motor torque as well for fast acceleration (for short periods). It's a lot quicker than my old 1.6 Ford Focus when overtaking. There is a bit of lag as it gets all the motors pointing the right way before it takes off, though. Beware the sticker shock - this car, three months old, ex-demonstrator, cost me £16,350 (less trading in the seven-year-old Focus for £1,750). Small diesels will use less fuel than this even after allowing for the fact that diesel has more energy per unit volume than petrol (it's about 13%, with only a 10% premium in price in the UK). It depends what you want the car to do. Personally the technology in the Prius intrigued me, and I have to say I like the acceleration and the space.

    DoEvents: Generating unexpected recursion since 1991

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    Dan Neely
    wrote on last edited by
    #68

    Mike Dimmick wrote:

    Performance - it has no step gears, being an 'electric CVT', so you don't lose any time changing gears. The car can keep the engine turning at peak torque and apply the motor torque as well for fast acceleration (for short periods). It's a lot quicker than my old 1.6 Ford Focus when overtaking.

    depends what you're comparing with I guess. Compared to my GM 3.8 v6 the prius felt rather pokey on the highway.

    You know, every time I tried to win a bar-bet about being able to count to 1000 using my fingers I always got punched out when I reached 4.... -- El Corazon

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    • R Ray Kinsella

      Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

      Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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      stevepqr
      wrote on last edited by
      #69

      A few years back I had a Renault Laguna in which I regularly got 32mpg (UK). During a tanker drivers strike I think it was I had a tank of gas to last until whenever the supplies were restored (no way I was going to queue up for 3 hours at 2am just to get a 2 gallon ration!) Purely with careful driving (rolling stops, slowly pulling away, changing gear at the right time, rolling down hills etc) I managed to get 52mpg. Its amazing how much you can ease off the gas and still get to where you're going within a couple of minutes of the time you used to do it in.

      Apathy Rules - I suppose...

      Its not the things you fear that come to get you but all the things that you don't expect

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      • R Ray Kinsella

        Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

        Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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        Ed Poore
        wrote on last edited by
        #70

        Well if you call them cars: Suzuki Swift '03 - Have yet to drop below 40mpg and that's averaging 70+mph most of the time, or country lanes in low gears. Mitsubishi Shogun '93 - Did a fuel consumption run down from Scotland on motorways at 70mph (cruise control) and then 3 hours low range work in Shropshire then a 4h fast/hard drive down through Wales along the moutains. Carrying 1/2 a tonne she averaged 25mpg (combined figure in manual is given as 27 best case scenario). '83 Land Rover Series III - very fuel efficient[^] :cool: 20 year old tractor - no idea 4 tonne dumper truck - probably about 1mpg if that. 3.5 tonne digger - probably about 4gpm :rolleyes:


        I doubt it. If it isn't intuitive then we need to fix it. - Chris Maunder

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        • M Mike Dimmick

          You've done your conversion the wrong way round. US gallons are smaller than UK gallons, so you get fewer miles per US gallon than imperial. Your 35mpg Imperial is equal to 29.1mpg US.

          DoEvents: Generating unexpected recursion since 1991

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          Anna Jayne Metcalfe
          wrote on last edited by
          #71

          That'll teach me to try to use a calculator first thing in the morning. :doh:

          Anna :rose: Having a bad bug day? Anna's Place | Tears and Laughter "If mushy peas are the food of the devil, the stotty cake is the frisbee of God"

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          • D Dan Neely

            Chris Austin wrote:

            Also, I am surprised you are only getting 45MPG in your Prius, I've hit that in my Corolla on long road trips and we do consistently 50MPG on our Prius

            Depends how fast you're driving. A friend of mine has one, he gets 50's in local highway driving and city driving. Only mid 40's on longer highway drives because the fuel savings isn't justified when it means an extra hour instead of an extra 5 minutes on the road.

            You know, every time I tried to win a bar-bet about being able to count to 1000 using my fingers I always got punched out when I reached 4.... -- El Corazon

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            Pedro_FP_Simoes
            wrote on last edited by
            #72

            I have one Toyota Yaris Diesel with 90HP, and it makes 100 Km with 5 L of Diesel, it has a great top speed for this type of car, 200Kmh, and it is very safe, a lot of airbags, the structure it's very reenforced, etc ... Toyota make great cars.

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            • R Ray Kinsella

              Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

              Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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              Frank Kerrigan
              wrote on last edited by
              #73

              I ride a motorbike most of the time Yamaha 600 sports which gets about 55mpg or £20 for the month. My Mrs has a Renault Senic desiel which does 40Mpg in the city and 60Mpg on motorways etc... Full tanlk has a range of 550 miles. There someone I know who uses veg oil mixed with a few litres of reg desiel and a little methanol (meths out the chemist) to run a desiel car; saves a fortune I beleive.

              DEVELOPER DAY SCOTLAND 10th MAY 2008 http://www.developerdayscotland.com/[^]

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              • F Frank Kerrigan

                I ride a motorbike most of the time Yamaha 600 sports which gets about 55mpg or £20 for the month. My Mrs has a Renault Senic desiel which does 40Mpg in the city and 60Mpg on motorways etc... Full tanlk has a range of 550 miles. There someone I know who uses veg oil mixed with a few litres of reg desiel and a little methanol (meths out the chemist) to run a desiel car; saves a fortune I beleive.

                DEVELOPER DAY SCOTLAND 10th MAY 2008 http://www.developerdayscotland.com/[^]

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                Dan Neely
                wrote on last edited by
                #74

                Frank Kerrigan wrote:

                There someone I know who uses veg oil mixed with a few litres of reg desiel and a little methanol (meths out the chemist) to run a desiel car; saves a fortune I beleive.

                ... probably right up until the powers that be realize your friend is guilty of tax evasion for not paying fuel tax on all the veg oil being put into the tank. :doh:

                You know, every time I tried to win a bar-bet about being able to count to 1000 using my fingers I always got punched out when I reached 4.... -- El Corazon

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                • R Ray Kinsella

                  Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

                  Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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                  GWW3
                  wrote on last edited by
                  #75

                  My Scion Xa manual transmission gets 34MPG mixed highway/city. Highway alone I get around 38MPG. Not too bad but I would love to get 60 or go all electric.

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                  • R Ray Kinsella

                    Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

                    Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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                    jtmueller
                    wrote on last edited by
                    #76

                    I commute to work on a Yamaha Zuma: 123 mpg.

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                    • R Ray Kinsella

                      Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

                      Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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                      Jordon4Kraftd
                      wrote on last edited by
                      #77

                      I get down to 7.8l/100km, I am not sure what that calcualtes to MPG but I think it is fairly good. In the city I drive agressive, why wouldn't i I did get the V6 not the 4cyl, then it drops to 11L/100km. Those numbers calcualte to.... 30.6 US, 36.22 Euro MPG on Highway and 21.38 US, 25.6 Euro MPG in City. I am happy for now, only owe a few more months on it amybe I'll get one of those prius's or wait till they get better hybrids (affordable). My 2 cents.

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                      • R Ray Kinsella

                        Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

                        Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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                        L e g i 0 n
                        wrote on last edited by
                        #78

                        Come spring I ride a motorcycle. It's a heavy cruiser but still gets 50mpg woo-hoo!!!

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                        • D Diego Moita

                          Chevrolet Corsa Flex (Brazilian car on gas and ethanol) On gas: 31 miles/gallon On ethanol: 22.34 miles/gallon ;P It's not very fast, but since urban traffic is always slow...


                          Of all forms of sexual aberration, the most unnatural is abstinence.

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                          z974647
                          wrote on last edited by
                          #79

                          If you want safety, longevity, and decent mpg and don't have a lot of $, find you an old, low-mileage (good luck) Volvo 240. The newer cars bounce right off of it. :wtf: You can find 15 - 20 each day on ebay. They seem to run from $500 - $7,000 or so.

                          What does an agnostic, dyslexic, insomniac do? He lies awake at night wondering if there's a dog.

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                          • C Chris Austin

                            The Yaris does great. But also rember that the UK uses imperial gallons and in the US we use well, US liquid gallons. To really gauge this you need to convert apples to apples. Doing so 1 MPG (US) = .425km/L 1 MPG(Imperial) = .354km/L So your Prius is getting 19.2km/L and Colin's Yaris is getting 19.5km/L. Still impressive but also keep in mind that the Yaris is a much smaller and lighter car than the Prius. Also, I am surprised you are only getting 45MPG in your Prius, I've hit that in my Corolla on long road trips and we do consistently 50MPG on our Prius

                            Sovereign ingredient for a happy marriage: Pay cash or do without. Interest charges not only eat up a household budget; awareness of debt eats up domestic felicity. --Lazarus Long

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                            Tom Delany
                            wrote on last edited by
                            #80

                            Chris Austin wrote:

                            Also, I am surprised you are only getting 45MPG in your Prius, I've hit that in my Corolla on long road trips and we do consistently 50MPG on our Prius

                            As you know, the Prius actually does the best MPG-wise in local stop and go traffic. We sometime take ours out on the highway, which may lower it slightly. Also, I am bad about filling up at the local Hess station, which has a certain (small) percentage of Ethanol in their gas, which may also lower it slightly. I also tend to be a lead foot more than I should when I take off from a light, etc. :-\

                            WE ARE DYSLEXIC OF BORG. Refutance is systile. Your a$$ will be laminated. There are 10 kinds of people in the world: People who know binary and people who don't.

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                            • F firegryphon

                              Kyudos wrote:

                              America could lower the price of oil the world over if everyone there drove a car with a 1 litre engine. Lets face it, your speed limit is so low, you don't need anything larger...

                              Actually, a well designed aerodynamic shape wouldn't take all that big of an engine to go very fast, but you wouldn't have much room in it. Since half the people here are still in SUVs, they need the 4 or 5 liter engines just to get the things out of the way of other drivers at an intersection. Though, case in point, I have a 2.4 liter engine that has taken me up to 158 mph up a hill and only stopped accelerating due to knowledge of the next turn on the course. I think that is a perfect reason to restrict lambos to 4 cylinders ;)

                              Kyudos wrote:

                              And if so, why is that the only metric measure you've adopted?

                              We are slightly less confusing then the English who not only use MKS units, but when referring to their weight I hear many use stones... As for changing all the way over? Do you have ANY IDEA how many road signs we have? The cost of changing them would be astronomical! (Literally, we could send a robotic spacecraft to Mars for the cost of it) ;)

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                              Kyudos
                              wrote on last edited by
                              #81

                              True enough, and its the same in Britain. All our road signs are still in miles, people refer to MPG (not litres per 100km or whatever the f--- it is). We buy beer in pints and weigh ourselves in stones and pounds (and kilos too, sometimes, I suppose).

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                              • K Kyudos

                                True enough, and its the same in Britain. All our road signs are still in miles, people refer to MPG (not litres per 100km or whatever the f--- it is). We buy beer in pints and weigh ourselves in stones and pounds (and kilos too, sometimes, I suppose).

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                                firegryphon
                                wrote on last edited by
                                #82

                                Kyudos wrote:

                                We buy beer in pints

                                "They come in pints!? I'm getting one!"

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                                • R Ray Kinsella

                                  Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

                                  Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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                                  NimitySSJ
                                  wrote on last edited by
                                  #83

                                  You must live in Europe or something. I'm from America, where we like everything bigger and badder. Hello world? Not unless it's running on an IBM Blue Gene, one string per processor. I'll take an M1 Abrams (fuel hogging) tank for my car, and my entire infrastructure on Visual Basic 6. I vote for bloat! X|

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                                  • J jtmueller

                                    I commute to work on a Yamaha Zuma: 123 mpg.

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                                    NimitySSJ
                                    wrote on last edited by
                                    #84

                                    "the small 49cc Yamahas claim a fuel efficiency rating of 115 mpg!" (see reference) You must have one of the tiny ones. Works out great on flat surfaces, but can't clear a hill in excess of 4 inches. ;) Reference http://www.motorcycle-usa.com/Article_Page.aspx?ArticleID=4884&Page=1[^]

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                                    • L Lost User

                                      Swap the Aston for an Aerial Atom :)

                                      Visit http://www.notreadytogiveup.com/[^] and do something special today.

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                                      Stuart Dootson
                                      wrote on last edited by
                                      #85

                                      Definitely - I had a Civic Type R, and the powertrain (especially the gearbox) was brilliant. Mated to a 400kg car (or whatever the Atom is)? Insanity, even without the supercharger :-)

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                                      • R Ray Kinsella

                                        Any CPians driving fuel efficient cars ? What are they and how do they rate performance versus efficiency trade off ?

                                        Regards Ray "Je Suis Mort De Rire" Blogging @ Keratoconus Watch If its fast and ugly, they will use it and curse you; if its slow they will not use it -- David Cheriton

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                                        Mark_Wallace
                                        wrote on last edited by
                                        #86

                                        I'm about as fuel-efficient as you can get. I live a six-minute walk away from work -- which is pretty good, given that I'm only a ten-minute walk in any direction from the open countryside (with trees and squirrels and cows and things). I think I'm with the only IT firm in the world where you can have your lunch in a forest. A *real* forest. Don't feed the bears. I don't even keep a car, because the major automotive functions, of getting to work and/or the shops (there's almost every kind of shop, including a supermarket, in this little developed island in the wilderness) just don't apply. The costs saved by not running a car cover an awful lot of taxi fares for the long-ish distances to larger habitational centres.

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