“New European Driving Cycle.” Contains the rules that define how auto manufacturers must test how many miles/kilometers their vehicles drive per gallon/liter of gasoline consumed. The N.E.F.Z. came into effect in the 1970’s and its mileage testing rules are scheduled to be replaced by the Worldwide Harmonized Light Vehicles Test Procedures (W.L.T.P.) in 2016, though the European auto manufacturers’ lobby A.C.E.A. is lobbying to delay the new rules until 2020.
Spiegel.de said the Financial Times (paywall) reported on the A.C.E.A.’s attempt to delay stricter mileage tests for four more years. Under the current rules, auto manufacturers can legally reduce gas consumption by hacking the mileage testing of their own products by using “light tires, special lubricants, taping off gaps on the hood or headlights for better aerodynamics. Some unclamp the battery to keep it from being charged, and they test at ideal environmental temperatures.”
The new mileage testing rules would require “more realistic” conditions, including faster accelerations, higher speeds and less idling time for the engines.
Meanwhile, two Spanish hackers who presented about a $26 tool they said they created that let them remotely access steering, speed controls, brakes and heating/cooling, in both a test car from a U.S. manufacturer and a test car from a Japanese manufacturer, said these mini-computers under the hood can improve mileage just by changing a few numbers.
“Would you like to spend less money on gas? Did you know that the difference between 100 horsepower and 130 horsepower version of your car is just some changes in the engine control unit firmware?”
Update on 30 Apr 2014: ZDF heute journal compared car owners’ reported mileage with the considerably better N.E.F.Z. mileage asserted in the manufacturer’s print and video ads for one model, then asked its manufacturer for an explanation. Ford drew their attention to a line in the fine print that said the mileage numbers printed in the offer were not part of the offer.
Then ZDF accompanied an automobile magazine’s consumer product testing of the mileage of several cars, driven along the same varied route during normal working hours by the same driver who is an expert in reducing gas consumption. “No one can get higher mileage out of a car than this guy.” In their test, the Ford model in question used 13% more gas than was advertized as its normal consumption, a Citroen deviated by 0%, a VW beat the value at -1%, an Opel beat the value at almost -2% and a Peugeot used >35% more gas than advertized.
(NOY ah oy roe PÆ ish ah FAH tsee clues.)