Dl5treez
Super Moderator
Well I never said that. I said there is too much variance in diesel fuel across North America to make most determinations about additives causing fuel economy and power increases relevant unless there is a LOT of control built in. Some data to look at would be ASTM D975 which is the standard adopted by most of the US and N America for diesel fuels. Or ASTM D613 which sets standards for ULSD that conflicts. Or how the lubricity standards are inconsistent.Where are you getting the info that Diesel in NYC is any different than in Calif?
California and their min cetane of 53:
https://www.arb.ca.gov/enf/fuels/dieselspecs.pdf
TEM’s call to action for improving the standards:
http://www.truckandenginemanufacturers.org/file.asp?A=Y&F=20050818+North+America+Ultra+Low+Sulfur+Diesel+Fuel+Properties.pdf&N=20050818+North+America+Ultra+Low+Sulfur+Diesel+Fuel+Properties.pdf&C=documents
Boutique fuel programs across various states: Most of these relate to gasoline but some are for diesel fuel:
https://www.epa.gov/gasoline-standards/state-fuels
Texas in particular has rather complex network of county level adopted Low Emission Diesel standards that currently cover 110 counties:
https://en.m.wikipedia.org/wiki/Texas_Low_Emission_Diesel_standards
https://www.tceq.texas.gov/airquality/mobilesource/txled/cleandiesel.html
There are more but that should keep you busy.
We haven’t even covered regional and local vendors and their own formulation of additive packages to make their own “premium diesel” which is a dog & pony show all its own.
That’s why I said it’s virtually irrelevant to compare individual results across the country.
Hope this helps
Dan