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> Coolant Problems in 2007-2008 Diesel Engines

> Alert for New York State Customers regarding Retrofit of Emissions Devices on Diesel Engines

> Latest Information of Ultra-Low Sulfur Diesel - December 2007

> Non-Road, Locomotive, and Marine Diesel Fuels

> Cold Filter Plug Point vs. Cloud Point Cold Weather Operability in Diesel Fuels including ULSD

> Winter Problems with ULSD

> Black Fuel Filters - Asphaltene Production in ULSD Fuels

> Fuel Phase Separation in Ethanol Blended Gasolines

> NRLM - Non-Road, Locomotive, and Marine Fuels - Non-Highway, Off-Road Diesel Fuels

> Winter Blended Diesel Fuels 2

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> Winter Blended Diesel Fuels

> The Color of Diesel Fuel

> Motor Oil for Diesel Engines CJ-4 vs. CI-4

> New EPA Diesel Fuel Additive Labeling Requirements Required as of June 1, 2006

> Diesel Wins Le Mans 24 Hour Endurance Race

> Crude Oil and Total Petroleum Imports Top 15 Countries

> What the Heck is Sticktion

> Ultra-Low Sulfur (S-15) Diesel Fuel Facts

> Water Generation in Stored Diesel Fuels

> Why you should be Using Nitrogen for Inflating Tires

> Radiator/Antifreeze Plugging Problem in Gasoline Engines

> Oil Sludge in Gasoline Engine Vehicles

> Ethanol in Gasoline

> Ultra-Low Sulfur Diesel 2

> White Paper on Emergency Backup Power Generators and Fire Pumps

> The Price of Fuel

> Magnetic Fuel Treatment: Myth, Magic, or Mainstream Science?

> Gasoline Problems

> Ultra Low Sulfur Diesel

> MTBE Phase Out in Gasoline's - Possible supply disruption

> Lubricity in High, Low, and Ultra-Low Sulfur Diesel Fuels

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The Color of Diesel Fuel

What color is your new Ultra-Low Sulfur Diesel (S-15) fuel?

We are seeing some almost as clear as water, some a brilliant green, some a bright yellow, some amber, and some an unusual oily blue color.

Why is this happening, and what does it mean to you, the end user.

If you have been following my previous columns we have discussed how no two refineries in the US are of the same design. Each one is a one-off, custom unit, each with its own combination of processes and equipment.

Diesel fuel has always been sold as a homogenous product that is supposed to the same no matter where you get it from. The reality is that different crude oils refined at different refineries, using different process have always produced different fuels.

Refiners use a combination of additives and blending of different stocks to obtain fuel that meets the ASTM specifications.

This process is similar to blenders of whiskey blending different whiskeys together to produce a consistent product as opposed to a distiller producing a single malt Scotch, a product that tries to be unique. Both will accomplish the same result, it just a question of how you get there.

Today the addition of catalytic crackers used for hydrodesulphurization or severe hydrotreating affects fuel in many ways, some good, some not so good.

The colors we are seeing in the fuel are the result of different crude oils being run through different refining processes and the catalysts used in the catalytic cracking during that refining.

The colors themselves do not appear to be important at this time.

There are a few high end laboratories that can take a sample of crude oil and identify what oil field it came from. I believe in time we will be able to identify not only where the crude for a given diesel fuel came from, but at which refinery it produced. This may lead to a way to tell who is producing the best fuel for the money.

The use of Well Worth Products Summit Diesel Fuel Treatment provides cost effective protection of equipment. Summit will improve the quality of any diesel fuel, which can increase mileage, enhance operability, reduce emissions, add lubricity, prevent gelling, and save money for the operator.

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