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Diesel is more efficient than gas as far as MPG, so CO2 is actually less per mile, NOx and particulates should be equivalent on a modern diesel with DPF and DEF
by SigmundA 4y ago
Diesel is more efficient than gas as far as MPG, so CO2 is actually less per mile, NOx and particulates should be equivalent on a modern diesel with DPF and DEF SCR.
- zug_zug 4y agoDoesn't pass the smell test - I can smell diesel exhaust from at least 100 feet away (maybe 10x as pungent as non-diesel), has to be something I'm smelling
- idiotsecant 4y agoIf i let an egg rot in your yard you'll smell it too, doesn't mean it has a meaningful contribution to nox, particulate, or carbon emissions. Things can be smelly without being bad emissions-wise.
- SigmundA 4y agoIs it a modern diesel with DPF and SCR? The smell from the exhaust of my 2021 6.7 liter cummins diesel motorhome is actually almost undetectable to me while my 2016 V10 gas motorhome had a very noticeable smell. Perhaps the diesel is not ULSD https://en.wikipedia.org/wiki/Ultra-low-sulfur_diesel https://en.wikipedia.org/wiki/Ultra-low-sulfur_diesel
- gruez 4y ago>NOx and particulates should be equivalent on a modern diesel with DPF and DEF SCR. Is it? I thought the whole deal with dieselgate was that they couldn't get it to be more efficient and comply with emissions regulations, so they ended up cheating.
- SigmundA 4y agoDieselgate was trying to avoid using DEF claiming you could get compliant NOx output without it [1]. You can if you reduce power and efficiency during the test cycle, if you want good power and efficiency while having compliant NOx output you need DEF on a diesel engine and it works very well but does increase complexity and cost. https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal