I must call foul, but I am unclear whether I am calling foul on: *EPA's methodology *Tesla's honesty *Andrew's investigative reporting and numeracy Quoting from the article, ## Now Tesla has raised the stakes again by introducing the Tesla Roadster 2.5 that boasts an MPGe rating of 112 MPGe on the highway and 124 MPGe in the city. This combined rating puts the overall MPGe for the Roadster 2.5 at 119 MPGe. When the new 2.5 Tesla Roadsters will become available is anyone's guess. However, with the original Roadster boasting an overall MPGe rating of 111 the improved 2.5 model is undoubtedly going to be a success. One interesting thing to point out is that other than the more efficient MPGe rating the rest of the Tesla Roadster 2.5 statistics remain unchanged from its predecessor; i.e. annual fuel costs, approximate range, and kW-hrs per 100 miles. ## 119 MPGe and 111 MPGe can not BOTH be represented by 30 kW·h/100 mi. Using a DoE data sheet (and some conversion) reformulated gasoline (would EPA use any other kind) is 119.87 MJ/gallon. Using this figure, I confirm that 111 MPGe is 30 kW·h/100 mi, but 119 MPGe is 28 kW·h/100 mi. Obviously the useful, meaningful expression of fuel economy for an electric vehicle is just some decoration the EPA makes them throw on the label. It is not simple reporting error. The labels have been previously reported with graphics. Only fake gallons are real! http://green.autoblog.com/2011/05/26/epa-rates-tesla-roadster-at-111-mpge/ http://news.consumerreports.org/cars/2011/05/extreme-epa-window-sticker-tesla-roadster-rated-111-mpge.html
Pat and I challenge each other on conversion. I am going to offer a new defense of conversion: "He who can't convert in a 'dual' society gets hoodwinked." I agree with Pat that we need to get past conversion and truly metricate, but we have a Congress that currently guarentees that can't happen because they will pass (and demonstrably have passed) laws to prevent it. I blame Congress, not centimeters. ________________________________ From: Pat Naughtin <[email protected]> To: U.S. Metric Association <[email protected]> Sent: Sat, June 25, 2011 11:39:40 PM Subject: [USMA:50743] MPGe = miles per gallon equivalent? Dear All, You will be interested in this reference from Reuters: http://www.reuters.com/article/2011/06/24/idUS27637249720110624 where they write: So, the EPA had to come up with a new unit of measurement in order to help the public understand all those crazy and complicated numbers. Essentially, the EPA had to dumb stuff down so people could understand what they were talking about- if the EPA has to make up a new system of measurement to replace an existing system of measurement that is deemed to tricky by the masses,I guess this sort of puts the final nail in the coffin for the metric system ever being adopted in the U.S. I emphasised the last sentence of the quote. Better still, I will repeat it here: I guess this sort of puts the final nail in the coffin for the metric system ever being adopted in the U.S. Cheers, Pat Naughtin LCAMS Author of the ebook, Metrication Leaders Guide, see http://metricationmatters.com/MetricationLeadersGuideInfo.html Hear Pat speak at: http://www.youtube.com/watch?v=_lshRAPvPZY PO Box 305 Belmont 3216, Geelong, Australia Phone: 61 3 5241 2008 Metric system consultant, writer, and speaker, Pat Naughtin, has helped thousands of people and hundreds of companies upgrade to the modern metric system smoothly, quickly, and so economically that they now save thousands each year when buying, processing, or selling for their businesses. Pat provides services and resources for many different trades, crafts, and professions for commercial, industrial and government metrication leaders in Asia, Europe, and in the USA. Pat's clients include the Australian Government, Google, NASA, NIST, and the metric associations of Canada, the UK, and the USA. See http://www.metricationmatters.com/ to subscribe.
