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    GREET_2021 LCA of Various Vehicle Technologies

    The latest version of Argonne National Laboratory's GREET (Greenhouse gases, Regulated Emissions, and Energy use in Technologies) model was recently released ( Based on this latest GREET model (GREET_2021), the following are...
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    New LCA Model

    For anyone interested, a European firm (Paul Scherrer Institut) has developed an on-line life-cycle assessment (LCA) modeling tool called "carculator" - . The tool has an online graphical user interface and can be used to assess...
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    New NOx Emissions Reduction Disbenefit Discovered

    ...targeting nitrogen oxides emitted by cars and power plants could initially actually increase harmful [wintertime PM2.5] air pollution, the researchers reported in their new paper, out today in the journal Geophysical Research Letters....
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    Renewable Energy Group Launches REG Ultra Clean™ Diesel

    (bold emphasis added)
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    Another Disbenefit to NOx Emission Reductions Discovered

    As has been discussed on this board many times, it has been known for decades that large reductions in NOx emissions in certain locations can lead to an increase in ambient ozone levels ("weekend effect"). This mostly occurs in large metropolitan areas. A paper just published in the Proceedings...
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    Judge OKs VW deal to spend $1.2B more on diesel fix [3.0 TDI]
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    New data reaffirms carbon benefits of biodiesel
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    Biodiesel from engineered sugarcane more economical than from soybean
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    Municipal Solid Waste to FT diesel
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    Diesel Exhaust Odor From 2008+ Diesel Vehicles

    I have seen multiple comments on some "green" car sites which claim that the exhaust of "clean" diesel vehicles still has very noticeable "diesel fumes" smell. When I have challenged the characterization of the exhaust as having any smell whatsoever, I have been accused of either lying or have...
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    Study - No Lung Cancer From Exposure to New Technology Diesel Engine Exhaust

    The Final Advanced Collaborative Emissions Study (ACES) Phase 3 Report has been issued.
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    First Production Vehicle to Use GPF

    Mercedes-Benz S500 is the first production vehicle to use a gasoline particulate filter (GPF) in Europe...
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    EPA Requires Ford to Correct Fuel Economy for Six Vehicle Models

    WASHINGTON - The U.S. Environmental Protection Agency (EPA) today [6/12/2014] announced that Ford Motor Company (Ford) is revising the fuel economy (mpg) estimates for six vehicle models to correct errors found in an internal Ford audit. Ford is required to correct fuel economy labels on...
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    Meeting Stringent 2025 Emissions and Fuel Efficiency Regulations with an OP Diesel

    Source: Redon, et al. (2014) “Meeting Stringent 2025 Emissions and Fuel Efficiency Regulations with an Opposed-Piston, Light-Duty Diesel Engine.” SAE Technical Paper 2014-01-1187, (abstract) More info available at...
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    EPA Finalizes Tier 3 Emission Regulations

    Final Rule for Tier 3 has been adopted...
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    ACES Phase 2 Final Report Released

    The Advanced Collaborative Emissions Study (ACES) Final Report has been released ( Full report available at
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    New Study on Effects of Decreased NOx Emissions on Ambient Ozone

    We have discussed the relationship between NOx, VOC, and ambient ozone for many years at TDIClub ("weekend ozone effect"). There is a new study which appears in the October 2013 issue of Atmospheric Environment which examines the effects of near-zero emissions during a several year study of Tel...
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    Diesels account for 30.4% of VW US sales in August, 24.3% YTD
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    Canada announces alignment of emissions standards with US
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    Volvo Car Group’s new VEA diesels will use i-ART injection systems