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General VW Discussion This is a place for General VW topics (the company, not your vehicle). General topics about a specific vehicle should be posted in the General TDI Dicussion Forum sections for that vehicle platform. A4, A3 & B4, B5, etc.

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Old March 15th, 2019, 10:12   #16
Powder Hound
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Join Date: Oct 1999
Location: Conkud, New Hampshiyuh, USA
Fuel Economy: pretty freakin' good.
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Originally Posted by MAXRPM View Post
...so to say additives do not do anything I would say it depends how you lay it out, real test is to have the pumps withoout additives and issueless for so many years and miles in the car.
Hence, without double blind studies, which would take many years and a budget measured in cubic dollars to perform, a definitive empirically generated answer is not possible.

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PH
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Old March 15th, 2019, 14:39   #17
BeetlePD
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At least post the url. You could be manufacturing this 'study'.
. I read it YEARS AGO so should I memorize web addresses that old? Anyway I googled it for you and found this : Not sure if it’s the same study but it looks similar

https://www.epa.gov/sites/production...r_korotney.pdf

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If you really feel that everything US is bad, then STFU and please leave! I
Wow

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Old March 15th, 2019, 16:18   #18
MichaelB
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Location: SE Wisconsin
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. I read it YEARS AGO so should I memorize web addresses that old? Anyway I googled it for you and found this : Not sure if it’s the same study but it looks similar
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Originally Posted by BeetlePD View Post


According to that study that you just posted higher cetane numbers reduced the Nox not increased it so it was not vetoed because of increased Nox. It was determined that that increased cost would deter the buyer from purchasing it, This is also taking place in 2003 and totally irrelevant to low cetane destroying your car's engine.


This is from that study:
"typical" cetane increase of 5 numbers will produce a 2.1% reduction in NOx"















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