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Q: Short Term Working a Garage.

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I was going to work with my dad on his Honda this weekend. I was just wondering what is the ppm of CO from modern cars, and if it is lethal?

A: Hello there, thanks for writing in. For lig...

Hello there, thanks for writing in. For light duty vehicles, it is 3.4 grams per mile. I think the old readings use to be .02 ppm. Now the test requires you to run on a dyno and is in grams per mile. And yes to your last question - it is lethal.

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