• Apr 3rd 2009 at 12:43PM
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2010 Toyota Prius – Click above for high-res image gallery

We already knew the 2010 Toyota Prius would put up some impressive fuel economy numbers but the official Japanese numbers are just insane. On the standard 10-15 test cycle, the new Prius is rated at 89.4 mpg (U.S.) with CO2 emissions of just 61 g/km! While the new Prius is certainly efficient, these numbers certainly seem highly unrealistic. It's likely that Toyota has calibrated the Japan market model to specifically get the maximum out of this low speed urban drive cycle (average speed 16 mph) and most drivers are unlikely to come anywhere near those numbers. Dedicated hypermilers, of course, can top 90 mpg, but that takes way too much effort. On the newer JC08 test cycle, the numbers drop a bit to a mere 76.7 mpg (U.S.). Here in the U.S. the Prius is rated at 50 mpg combined.

Photos Copyright ©2008 Brad Wood / Weblogs, Inc.

April 3, 2009

New Japan-market 'Prius' Gets World's Best Fuel Efficiency

Tokyo - TOYOTA MOTOR CORPORATION (TMC) announces that the Japanese-market version its third-generation ''Prius'' gasoline-electric hybrid vehicle has achieved the best fuel efficiency in the world1 for a mass-produced vehicle, as measured using the 10-15 test cycle of the Japanese Ministry of Land, Infrastructure, Transport and Tourism (MLIT). The achievement represents part of TMC's numerous and ongoing efforts to improve fuel efficiency through advanced vehicle development.

The new Prius, scheduled for launch in Japan in mid-May, has a fuel efficiency of 38.0km/l (CO2 emissions: 61g/km), thus exceeding by more than 25% the mandatory level required under the 2010 national standards. Also, under MLIT's newer JC08 test cycle, the vehicle has a fuel efficiency of 32.6km/l (CO2 emissions: 71g/km), thereby already meeting the 2015 national standards.

Emissions of both nitrogen oxides and non-methane hydrocarbons have also been reduced in the new Prius, with levels 75% lower than the 2005 standards under the MLIT's approval system for low-emission vehicles, which is currently the strictest standard in Japan for emissions. As such, under the Japanese government's taxation system for environmentally friendly vehicles, the new Prius is exempt from the automobile weight tax (until April 30, 2012), is exempt from the automobile acquisition tax (until March 31, 2012) and qualifies for a 50% reduction in the automobile tax (until March 31, 2010).

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    • 1 Second Ago
      • 6 Years Ago
      so the most full efficient car in the world (in Toyota Fantasy Island) is still lightyears behind the world record holder(and still in the Guiness Book of World Record with the lowest consuption for a stock production car) in distance fuel fefficent driving... the Volkswagen Lupo 3L ...

      33,333km around the world with an average consuption of 2.38l/100km = 100.4 (US) mpg = 120.5 (UK) mpg.... the lowest single day consuption during this trip was 1.99l/100km = 118 (US) mpg = 141.7 (UK) mpg...

      BTW the record was set in the year 2000.... long way to go Toyota till you real reach the record for production cars
        • 6 Years Ago
        Nagmashot you're hilarious!

        You want to compare the Lupo with the Prius? Ahahahah
        I would suggest you follow the same line and compare the "fuel" ratings of your bicycle with the Prius as well, heck why not, it should make sense to you!?!?
        Have you ever drove a Lupo? Have you ever been into one? Have you ever looked at its performance numbers? The Lupo was a joke, and for that it was discontinued. Try comparing oranges with oranges for a change ok? And yes, the Lupo would get beaten in this tests, since they are mainly city cycle tests, and the Lupo did not even feature a basic stop&go system on its ICE.
      • 6 Years Ago
      so when the second owner of the car needs to replace all of the batteries, in 5-6 years, what happens to all of this Hazmat we've imported?
        • 6 Years Ago
        dieseldriver: I find your ignorance disturbing.
        • 6 Years Ago
        GoodCheer, you also forgot to mention that the battery is warranted for 10 years / 150k miles in the dozen or so CARB states and given that half of Prius sales in the US are in California alone, it's highly unlikely that Toyota would design these to fail within warranty.

        For the rest of the country the warranty is 8 years 100k miles.

        Given their track record (battery failures are very rare) and the fact that hybrid component failures seem to be falling with each new generation of hybrids, I'd expect the 2010 Prius to be the most reliable yet.
        • 6 Years Ago
        This has never been an issue. Hybrids have been around longer than the time lenghts people claim. You're basing this on...your reading of anti-hybrid proganda articles?

        In addition, nickel metal hydride (which priuses use) is the same material as a regular car battery, whose disposal is regulated
        • 6 Years Ago
        Ah, just a sour grapes reaction when he realized that the Prius bested his beloved diesel in fuel economy - by a substantial margin.
        • 6 Years Ago
        Really? You're going with that?

        Thing 1: It gets recycled, like all valuable materials.

        Thing 2: There are Prius taxis with 400,000km on the original battery with negligible wear.
      • 6 Years Ago
      The 2nd gen Prius got 84 mpg (US) on the 10-15, so while 89.4 is a nice of an improvement, it is not huge.
      • 6 Years Ago
      @ Gordio

      "In addition, nickel metal hydride (which priuses use) is the same material as a regular car battery, whose disposal is regulated"

      You might want to check your facts...

      The batteries in most cars are lead-acid, and are mandated to be recycled because of the lead. Similarly, nickel-cadmium batteries are required to be recycled for the cadmium.

      Both are toxic heavy metals. Nickel-metal-hydride batteries aren't necessarily mandated to be recycled - and I don't think the RBRC is set up yet to handle a larger volume of batteries than the commercial AA / AAA / C / D sizes of the general public.
        • 6 Years Ago
        Let's assume that all batteries can be recycled...has anyone actually come up with the cost of recycling in terms of CO2? The whole point about the Prius is to emit less CO2 and pollutants but if the recycling of rare metals and chemicals is energy intensive the overall CO2 foot print of the Prius could be questionable, and maybe the dreaded diesel could win - shock horror!

        Up to know I have not been able to find (other than Toyota data) a Life Cycle Assessment of the Prius, can anyone help?

      • 6 Years Ago
      When will reporters on this site ever stop acting like mileage on other countries' drive cycles is remotely interchangeable with our own? Japan's is even gentler than Europe's.

        • 6 Years Ago
        EU consuption ratings are normed and pretty accurate...

        they drive a testcircle (in the real world) which is longer than the US and with higher top speed than they do in US test... the only thing that makes EU consuption ratings sometimes strange looking is the fact that they test the car with every electric equipment turned off... no air condition running, no lights on, no radio on, no fans on, no navigation system on etc...

        Japanese consuption tests are done in labors... the most unrealitic way to test the consuption
        • 6 Years Ago
        1) I don't think this was EVER a problem of assuming mileage is interchageable across countries--on any website I've ever read, including this one.
        2) Did you at least reach the last sentence of the article before posting?
        • 6 Years Ago
        brn, the headline clearly says "Japanese ratings" so I don't think there's any confusion. And "89.4 mpg (US)" means "89.4 miles per US gallon." (The distinction between Imperial vs. US gallon is very important, as US gallon is about 17% smaller.)
        • 6 Years Ago
        It was nice to see the US figures in the article, but it would have been MUCH nicer if the headline read:
        "89.4 mpg (50mpg US)"
        Instead of
        "89.4 mpg (US)!"

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