• Sep 5, 2005

As we mentioned in our write-up on GM's revised Duramax, the company showed journalists a prototype light-truck implementation of urea injection. Such technology allows for the reduction of NOx emissions, but the EPA has been hesitant to approve it. GM may be moving forward with it anyways, as 2009 emission rules for light trucks require that diesels burn as cleanly as gasoline engines. The alternative is a particulate trap, which hasn't yet demonstrated the required durability. Urea injection requires an occasional refill, but I'd personally be happy to take on an additional maintenance task in exchange for a vast improvement in fuel economy.



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    • 1 Second Ago
  • 6 Comments
      • 9 Years Ago
      "An ammonia baised acid like material"---isn't that pee? Not quite a "tiger in your tank", but times do change, I guess. If this is all it takes, we could run a tube from the driver straight to the engine compartment, right? So much for "rest stops" on the interstate. God, I love technology!
      • 9 Years Ago
      Does urea really have a negative environmental impact if it is spilled other than maybe a little dead grass? If not, what's up with the EPA's decision about this stuff?
      • 9 Years Ago
      It's like Waterworld!! Ok, not really.
      • 9 Years Ago
      Urea does come from pee, so that's awesome. Now when somebody gets pissed at me (yes that's a pun) and they pee in my gas tank I will have to thank them!
      • 9 Years Ago
      2009 emission rules for light trucks require that diesels burn as cleanly as gasoline engines This is misleading. The rules require that diesels burn more cleanly than gasoline engines, since diesels already put out less CO. The rules are geared towards gasoline engines.
      • 9 Years Ago
      I don't know a thing about this technology or if it even works, however I am completely in support of peeing into your car.