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Discussion Starter · #1 ·
Ok guys, kinda a geek question, but I heard the black soot from diesel engines is heavy and just falls to the ground as coal rather than raising into the atmosphere like exhaust from a gasser. Anyone else here this?

If this is true, why do Diesels need all the EGR stuff, and DPFs and exhaust fluid? are there other things in diesel exhaust besides soot that are bad for the atmosphere?
 

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Discussion Starter · #5 ·
It definitely dosent help when guy's trucks smoke a lot.

Im still curious about whether gas or diesel is more toxic when they undergo combustion. Do diesels have catalytic converters? I know my late model mustang has an EGR system, so that isn't unique to diesel. I did some research on wikipedia and it seems like the worst things in exhaust are oxides of nitrogen.
 
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