关于柴油的一些个人经验（有图）

x540d

本帖最后由 x540d 于 2014-4-8 17:53 编辑 上次保养的时候跟宝马的人聊过关于耗油，他们说如果不差那4分钱，可以试试bp的柴油，从买柴油车到现在大约三年了，从来没离开过口司和喔喔司，因为打着邮票和myer flybuy的积分，今天也就是巧合，上班着急什么卡都没带，而且油表指针已经到底，这种情况只能选择最便宜的加油站了，所以就加了bp ultimate 柴油
以前每次加完油之后，仪表显示大约能跑950公里左右，今天加完bp显示1070多，上班下班加起来45公里，这是快到家拍的照片
按照电脑显示 似乎bp 真的比其他的要好啊2014-4-8 17:51:05 上传
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x540d

如果真的能多跑出百八十公里的，那以后坚决比皮了！！

tu2011

哈哈，楼主跟我一样醒悟了，还好不晚。

zhongbingo

我总觉得扣死和窝窝屎都是欺骗消费者。

garysu

得长期测量对比才好给结论

一千零一夜

姐早已经换了，不能贪图便宜啊，害人伤车呀！！

一千零一夜

zhongbingo 发表于 2014-4-8 18:25
我总觉得扣死和窝窝屎都是欺骗消费者。
油本身就没多大利润，再给你打折扣，不给你掺点东西进去，消费者呢

Turing

会不会是扣司和喔喔司短斤缺两，BP不缺而已。

lolachen

What is a confounding factor?Epidemiological studies search for the causes of diseases, based on associations with various risk factors that are measured in the study. In addition to the exposures that the study is investigating, there may be other factors that is associated with the exposure and independently affects the risk of developing the disease. If the prevalence of these other factors differ between groups being compared, they will distort the observed association between the disease and exposure under study.  These distorting factors are called confounding factors or variables.A hypothetical example would be a study of coffee drinking and lung cancer. If coffee drinkers were also more likely to be cigarette smokers, and the study measured coffee drinking but not smoking, the results may seem to show that coffee drinking increases the risk of lung cancer, which may not be true. However, if a confounding factor (in this example, smoking) is recognized, adjustments can be made i

lolachen

本帖最后由 lolachen 于 2014-4-8 18:43 编辑 confouding的一个例子是，
如果你关注喝咖啡和肺癌的关系，一个喝咖啡的人要（比正常人）更有可能吸烟，但是你看到的，只是喝咖啡而不是吸烟，
所以你的观察，基于咖啡和肺癌，会给你一个错误的印象，就是喝咖啡导致肺癌如果楼主是用两辆一样的车双盲（驾驶员和检查油耗的人都不知道哪车用哪油），随机（根据随机数表用信封分配车辆和油站）试验的话，
走的路也类似，驾驶习惯也类似，
试验是同一天 （天气，湿度也类似那我相信。。在我看来，你可能观察到别的什么东西，比如天气冷了油耗变小。。。