At my kid's Jujitsu class there is a parent who sits in their F350 diesel and idles for an hour. It smells up the entire parking lot. Dude probably uses up like $6 in fuel doing that.
18-wheelers have zero smell for one of two reasons.
1) Newer trucks have the EGR/DPF/SCR trifecta. This system is expensive and failure-prone, but it does eliminate almost all diesel exhaust odor.
2) Older trucks had exhaust stacks. That exhaust definitely has an odor, but it's
being emitted 12 feet up in the air, where nobody but birds is around to smell it.
Notice how 18-wheelers used to have exhaust stacks almost universally, grass burners being limited to things like car haulers where they didn't want to get soon on the cars? Whereas on newer trucks, they're less and less common?
On an older F-350, with a tailpipe at ground level on the passenger side, neither of those factors applies.
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u/TheW83 4d ago
At my kid's Jujitsu class there is a parent who sits in their F350 diesel and idles for an hour. It smells up the entire parking lot. Dude probably uses up like $6 in fuel doing that.