Determining Degradation in Your Fuel

Fuel prices have been at an all-time low, the global pandemic had slowed down the economy, winter’s grip is lessening, you have weathered 2020 … has your fuel?

Fuel can degrade in storage while waiting for use and environmental conditions, water and bio duel blends can accelerate that degradation in your fuels.

What Is Diesel Fuel Degradation?

All diesel fuel degrades. The oxidative instability in diesel fuel creates fuel degradation materials like sediments and acids. These materials can result in hard particulate formation, corrosion, filter clogging and damage to fuel pumps and injector through deposits. The consequences can include increased maintenance issues, poor fuel economy, diminished performance and poor combustion quality resulting in issues like black smoke and difficulty starting, or even complete mechanical failure.

How to Avoid Diesel Fuel Degradation?

Most times, you’re not aware of how long your fuel may have been in storage, whether it’s for a short or considerable amount of time, the potential for fuel degradation is increasing.

What steps can you take to avoid or minimize it? It starts with understanding your fuels current state.

  1.  Test Your Fuel | Testing can help you know where your fuel stands. Understanding water contamination, biodiesel levels, cleanliness levels and degradation tendencies of the fuel.
  2. Understand Your Storage Tank Levels | Low fuel levels in a storage tank allows the formation of condensate. When you top off your diesel fuel storage tank, make sure you leave about 10-15 percent space on the top to minimize the condensation and to allow your fuel to react safely with changes in temperature.
  3. Keep a clean tank | Ensure draining your tank of settled water or clean your tank regularly so that there are fewer particles present that can cause a reaction with hour fuel.

To learn more about keeping your fuel clean, monitor degradation and keep it in usable condition, see our Technical Bulletin Verify Fuel Specs with ULSDF Testing, linked below.

Verify Fuel Specs with ULSDF Testing

Proven Impact. Proven Uptime. Proven Savings.
Let us prove it to you.

Published February 16, 2021

Monitor Biodiesel Content with FAME Testing

If you’re in the fuel industry, or store diesel to refuel your vehicles/machinery on site, then it’s likely you’ve heard about the increasing level of biodiesel and Fatty Acid Methyl Esters (FAME) content. What problems can it cause and how do we overcome them?

Fatty Acid Methyl Esters (FAME)

One of the reasons for Fatty Acid Methyl Esters (FAME) use in biodiesel instead of free fatty acids is to nullify any corrosion that free fatty acids would cause to the metals of engines, production facilities and so forth. Free fatty acids are only mildly acidic but, in time, can cause cumulative corrosion unlike their esters.

“Water is All Life” I’m sure you have all heard that phrase. For biodiesel blends it is more than true – it’s detrimental. The methyl esters in biodiesel are hygroscopic, meaning they can absorb considerably more moisture than petroleum-derived diesel and hold this in suspension in the fuel. When water is able to contaminate diesel, it provides conditions suitable for microbial growth and can lead to molds, yeasts and bacteria spreading throughout the fuel.

What is FAME?

  • FAME is bio-degradable and is an ideal source of nutrients for microbes
  • If contamination is left untreated, it can damage the fuel permanently
  • Petroleum-derived fuels absorb considerably less moisture by comparison and tend to shed water as a separate layer at the bottom of storage tanks
  • Acting as a detergent, it cleans any residual dirt or impurities from the tank walls and pipework it passes through, which ultimately end up in the fuel itself. This can lead to clogged filters and failed diesel fuel reports for cleanliness.

Types of FAME

Another factor in bio content, it is the type of FAME blended into the fuel, which can be very problematic. Biodiesel produced from soybeans, which is more common in the U.S. than in Europe, and is particularly problematic. Soybean Methyl Esther has a lower oxidation stability than biodiesel produced from other feedstock. Yet biodiesel has been a major boon to soybean farmers and they’ve been a major force behind raising the blend requirements. Biodiesel made from animal fat (tallow) has a higher level of saturates meaning it is more prone to waxing/gelling. It begins to crystallize at higher temperatures than bio made from vegetables oils, making your fuel appear cloudy and your filters clog. This higher cloud point makes the use of such biodiesel less suitable in the winter, which can further issues experienced when the cold months arise.

Why is BioDiesel Dilution Problematic?

Biodiesel Fuel Dilution can be a problem. Because biodiesel has a higher flash point than petroleum diesel, the biodiesel does not combust allowing the biodiesel to collect inside the crankcase of the engine itself and turn to sludge. This crankcase sludging is irreversible and over time can lead to catastrophic engine failure.

Learn more about biodiesel testing offered by POLARIS Laboratories® by downloading our technical bulletin Biodiesel Testing Ensures Quality below.

Biodiesel Testing Ensures Quality, Detects Potential Filter Plugging Problems

Proven Impact. Proven Uptime. Proven Savings.
Let us prove it to you.

Published February 4, 2021