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Author Topic: Smog Check with E85? Back to Topics
CiVX

Champion Author
Oakland

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Message Posted: Feb 13, 2014 9:18:14 PM

Dose it help you pass? Anyone know?
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BAJALRRP
Champion Author Tacoma

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Message Posted: May 4, 2014 11:34:58 AM

I live outside of a smog zone.....
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klroth025
Rookie Author Cleveland

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Message Posted: Mar 18, 2014 5:14:13 PM

@oilpan4 the info that krzysiek_ck posted says lower NOx from low sulfer ethanol. I'm not questioning your knowledge, but who is right on this one?
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Chazzer
Champion Author Nevada

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Message Posted: Mar 18, 2014 1:21:06 PM

Don't know. We don't have to smog our cars as we live in rural NV!

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stickyvalves
Champion Author Iowa

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Message Posted: Feb 15, 2014 9:50:59 AM

Don't have smog in Iowa now. Just a lot of frost around my rear bumper. And I'm only running E20 right now.
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krzysiek_ck
Champion Author Illinois

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Message Posted: Feb 14, 2014 3:11:33 PM

Stratght from GM presentation.

E85 emissions and fuel economy perspective

• Higher exhaust NMOG results from low volatility of E85
   • More E85 needed at cold start to offset low volatility
   • Results in moderately more NMOG before catalyst is active
   • E85 NMOG has a large fraction that is ethanol, which is much less prone to smog formation than gasoline HCs
   • These results are typical of E85
• Significantly lower NOx results from low sulfur level of E85
   • Sulfur acts to slightly impair catalyst reduction of NOx
   • These results are typical of E85
• Lower evaporative HC results from both lower permeability and low volatility of E85
   • Aromatic HCs in gasoline are primary permeation driver
   • Small gasoline fraction in E85 limits permeation
   • Lower volatility of E85 results in less vapor emissions
   • These results are typical of E85
• Lower CO2 emissions result from lower E85 carbon content
   • E85 has 30% less carbon per gallon and E85 fuel consumption is 26% higher than gasoline
   • These results are typical of E85

When I try to post a link it gets deleted. Google "Fuel Economy & Emissions: Ethanol Blends vs Gasoline"

[Edited by: krzysiek_ck at 2/14/2014 3:15:32 PM EST]
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oilpan4
Champion Author Virginia

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Message Posted: Feb 14, 2014 12:24:24 PM

I think it would help you pass a smog check if you have an excessive hydrocarbon problem.
But it would ultimatly mask some other problem.

If you have too much NOx more alcohol will make it worse.

[Edited by: oilpan4 at 2/14/2014 12:24:17 PM EST]
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stickyvalves
Champion Author Iowa

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Message Posted: Feb 14, 2014 6:21:56 AM

More water at the tailpipe.
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