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Automotive News & Views What is "wrong" with these new subcompacts?
8674 messages, Last post on Dec 01, 2009 at 11:23 PM
You are in the Automotive News & Views Forum. Your Hosts are steve_ & claires
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Replying to: oregonboy (May 29, 2008 7:39 am) also, i measure the odometer not the speedometer. you happened to hit something that fit that calculator. we replaced the conti's on the escape with the same size goodyear tripletread. they are huge compared to the original tires. you can see the physical difference in size. the gas mileage has been down some since then, but i am not sure if it is due to rolling resistance or tire circumference, or both. i also experienced a big drop in gas mileage when i changed tires on my focus. i got most of it back when i switched back to the original tire model. the smaller the car, the more the weight difference in tires plays into the gas mileage, too.
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Replying to: explorerx4 (May 29, 2008 2:15 pm) Just for clarity, what did you think the revs/mi was on the Miata.net chart? also, i measure the odometer not the speedometer. So you can back-average the speed so you know what to tell the kind gentleman with the badge? i also experienced a big drop in gas mileage when i changed tires on my focus. i got most of it back when i switched back to the original tire model Hmm your experience is someone opposite of mine. When I replaced the 195/60HR15 MXV4 Energy tires with 195/60VR15 Khumo ASX tires, I got both a dramatic improvement in handling, consistent fuel economy, and 4 Khumos were $12 more than 1 MVX4.
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Replying to: oregonboy (May 29, 2008 7:39 am) So you have to adjust a bit to compensate - unless you have a digital one that is - those are pretty close to exact with stock tires.
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Replying to: plekto (May 29, 2008 2:53 pm) Odometer Accuracy Not Regulated By Federal Law Investigation Reveals Inaccuracy Of Many Cars Odometers |
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Replying to: plekto (May 29, 2008 2:53 pm) Well, that and if it reads a higher speed, its more miles which helps the car companies a lot. It provides for shorter warranty periods (2-3% of 36,60, or 100k miles adds up), higher lease fees (people are going over mileage when they aren't), and people think they are getting better mileage than they are. They also service vehicles more frequently. I am not saying its a huge conspiracy, just food for thought. I think Honda got called out for making their speedos read too fast at one point. Alternatively, fines in European countries are levied by photo-radar starting at 3kph over the limit, which is not so much.
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Replying to: lilengineerboy (May 29, 2008 2:48 pm) if you want to measure mileage travelled by the speedo, it's ok with me, i just don't do it that way. i use a 30 to 40 mile run on the highway using the mile markers.
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Replying to: andre1969 (May 29, 2008 6:38 am) Isn't the whole point of an economy car economy? The very term, considering, if you look at the average, or better than expected, when used for a sub compact just proves the point. Sub compacts today may be better than some of their old sub compact relatives but no better than their bigger brothers in the mid sized and compacts are compared to their grand parents. But if you remember the old Camry and look at the new one you can see it is not only more comfortable but gets much better fuel mileage and is safer than the old Camry. That is pretty much the case across the board in that size car. But looking at your own quote you realize that sub compacts are not as good at their prime focus, economy, as they should be. But you can excuse that in the case of the CR-x, VW rabbit diesel and Metro twins with the simple words, considering the new standards. 
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Replying to: lilengineerboy (May 29, 2008 4:48 pm) While it may not be a huge conspiracy, you have to believe that the car companies are aware of the implications of their cars odometers reading high. 2-3% savings in warranty claims on millions of vehicles must be significant.  james
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Replying to: oregonboy (May 30, 2008 7:26 am) BMWs are famous for the "optimistic" speedometers.. I'd estimate that my wife's reads at least 4 miles over at 75mph.. But, her odometer is right on the money (checking over long distances by mile markers). When speedometer/odometers had a mechanical connection, that would be true, but now that they are electronic, the odometer doesn't necessarily get it's information from the speedometer, or vice versa.. regards, kyfdx |
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Replying to: explorerx4 (May 29, 2008 5:26 pm) Still, I think you are wrong to call the calculator useless. It give a fair indication of relative rolling circumference, which is quite useful. After I purchased my tires, I did confirm the accuracy of my speedometer in much the same way as you do: by measuring the transit time at a constant speed against the roadside mile markers. It's all good.  james
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