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Old 07-13-2013, 07:10 AM   #24
awdn8
Scooby Newbie
 
Member#: 270238
Join Date: Jan 2011
Chapter/Region: NESIC
Location: Maine
Vehicle:
2006 Impreza WRX TR
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Quote:
Originally Posted by DerrickRH View Post
That was really awesome as I keep hoping SOA brings us the turbo diesel. While he wasn't that fast, I bet he was averaging the best MPG getting there!

One question I have for anyone knowledgeable about diesels: I understand the MPG improvement and being able to run on lower octane diesel being overall better for the environment, but a lot of diesels I see on the road spew black smoke out the tailpipe when they give it the beans. What gives with that and is it really something toxic? Regardless, I want one.
The black smoke is caused by soot and unburned fuel. Very detrimental to air quality. Also, diesel emissions contain a very high amount of nitrogen oxides, leading to acid rain. The only "clean" diesels out there employ exhaust regen/particulate filter systems and d.e.f. systems to reduce the oxides of nitrogen. Otherwise, unless you are burning vegetable oil, most diesels out there are far from "green."
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