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Tikva
Lv 4
Tikva asked in Cars & TransportationMaintenance & Repairs · 1 decade ago

What color is diesel exhaust?

Just curious.

7 Answers

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  • nuniestar
    Lv 4
    1 decade ago
    Favorite Answer

    Black!

  • goodfella8243
    1 decade ago

    Diesel exhaust should not be visible if the truck is properly tuned. When you see smoke that is black coming from a diesel, that is diesel fuel that has not burned completely. It is not "unburned" diesel fuel, as unburned diesel fuel is just that......liquid diesel fuel.

  • spammer
    Lv 6
    1 decade ago

    None if the vehicle is properly maintained. When you see tons of black smoke is an excess of fuel been dumped and is not completely burned.

  • Fo Sho!
    Lv 4
    1 decade ago

    Usually a blue-ish color.

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  • why you need to know
    1 decade ago

    its carbon monoxide colorless odorless Gas. lol.. the black smoke you see is soot from the fule burning.

  • Alanrt1
    Lv 4
    1 decade ago

    Black

  • Anonymous
    1 decade ago

    99.9 PERCENT OF TIME IT IS BLACK.

    Source(s): 923
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