1. Emulsifiers / Dispersants (“Water Removers”)

These break water into microscopic droplets and suspend them in the fuel. The water then passes through the system and is burned off as vapor.

Pros: Good for small amounts of water, prevents icing, avoids visible free water.

Cons: Doesn’t eliminate water—just sends it to the engine. Too much can cause wear or corrosion. Not ideal for modern high‑pressure systems.

2. Demulsifiers (Preferred for Storage Tanks)

These cause water droplets to combine and settle at the bottom as free water.

Pros: Enables true removal via drains, separators, or polishing. Reduces corrosion and microbial growth.

Cons: Requires a way to physically remove the separated water.

Key Points

•             No additive destroys or converts water; claims otherwise are marketing.

•             Best practice: Use demulsifiers + mechanical removal (drains, separators, polishing).

•             For stored diesel: choose demulsifiers and remove water regularly; avoid strong emulsifiers in bulk tanks without drainage

MORE INFORMATION

The post Why Chemical Fuel Additives Don’t Remove Water from Diesel appeared first on Dieselcraft.

1. Corrosion and Rust Water speeds up oxidation on metal surfaces (tanks, lines, pumps, injectors), forming rust. Rust particles become abrasive contaminants that accelerate wear throughout the system.
2. Microbial Growth (“Diesel Bug”) Bacteria, fungi, and yeasts flourish at the water-fuel interface in the tank bottom. They consume diesel hydrocarbons, multiply rapidly, produce acidic byproducts (further corroding components), and form slimy biomass/sludge. This clogs filters and lines, while dead microbes add more particulates.
3. Loss of Lubricity and Increased Wear Diesel provides natural lubrication for high-pressure fuel pumps and injectors. Water dilutes this lubricity, leading to friction, scoring, erosion, cavitation (pitting), spalling, and premature failure—especially in modern common-rail systems.
4. Engine Performance and Combustion Issues
   • Hard starting, rough idling, misfires, stalling, or complete shutdowns (water doesn’t combust properly).
   • Power loss, poor acceleration, reduced fuel efficiency, and higher emissions.
   • In severe cases: Hydro-lock (water in cylinders), injector tip explosion, pump cavitation, or catastrophic damage.
5. Filter Clogging and System Blockages Sludge, biomass, rust, and particulates quickly plug fuel filters, restricting flow and starving the engine of fuel—often leading to sudden failures.
6. Long-Term and Costly Consequences Accelerated wear shortens engine/component life, skyrockets maintenance and repair expenses (e.g., injector or high-pressure pump replacements can run thousands of dollars), and increases downtime risks.

In essence, water doesn’t just sit harmlessly—it creates a snowball effect of degradation, especially in stored, standby, or infrequently used systems (generators, marine vessels, backup tanks, etc.). Prevention is key: Regular fuel maintenance—including water testing, stabilizers/biocides (used judiciously), effective water separators, good tank hygiene, and periodic polishing with tools like your purifier product—removes water early, stabilizes the fuel, and avoids most issues.

https://dieselcraft.com/portable-fuel-polishing/

The post Problems Caused by Water in Diesel Fuel and How to Prevent Them appeared first on Dieselcraft.

1. Dirt and Dust: Dirt and dust can enter the engine through the air intake system, leading to abrasion of engine components such as piston rings, cylinder walls, and valves. This can result in increased friction, reduced compression, and decreased engine efficiency.
2. Water: Water can cause serious damage to engines, particularly in diesel engines where water contamination can lead to injector and fuel pump damage. Water can also cause corrosion of metal components, leading to premature wear and failure.
3. Fuel Contaminants: Contaminants in fuel such as dirt, rust, and water can clog fuel filters, injectors, and fuel lines, leading to poor engine performance, rough idling, and decreased fuel efficiency. In severe cases, fuel contamination can cause engine stalling or failure to start.
4. Oil Contaminants: Contaminants in engine oil, such as dirt, metal particles, and sludge, can accelerate wear on engine components, reduce lubrication effectiveness, and cause overheating. This can lead to increased friction, premature component failure, and costly repairs.
5. Coolant Contaminants: Contaminants in engine coolant, such as dirt, rust, and air bubbles, can lead to corrosion of cooling system components, blockages in the radiator and hoses, and decreased heat transfer efficiency. This can result in engine overheating, coolant leaks, and potential engine damage.
6. Exhaust Contaminants: Exhaust contaminants such as carbon deposits, sulfur, and nitrogen oxides can accumulate in the exhaust system, leading to restricted airflow, increased back pressure, and reduced engine performance. Additionally, emissions of harmful pollutants can lead to environmental concerns and regulatory issues.
7. Combustion Chamber Contaminants: Contaminants in the combustion chamber, such as carbon deposits and oil residue, can interfere with the air-fuel mixture, combustion process, and exhaust gas flow. This can result in reduced power output, increased fuel consumption, and elevated emissions levels.

To mitigate the impact of contaminants on engine performance, regular maintenance is essential. This includes changing air, fuel, and oil filters at recommended intervals, using high-quality fuel and lubricants, flushing and replacing coolant as needed, and performing periodic inspections and cleaning of engine components. Additionally, proper storage and handling of fuel, oil, and coolant can help prevent contamination before it reaches the engine.

MORE INFO

Contact Dieselcraft to solve any contamination problem you have. Call or text 530 613 2150 Email sales@dieselcraft.com

The post Contaminants on Engine Performance appeared first on Dieselcraft.

Diesel fuel starts to degrade and become contaminated within 28 days of storage. Typically, fuel can be stored 6–12 months, but without proper care, its quality will decline.

To maximize storage life, many companies recommend:

• Keep fuel cool, ideally around 70°F
• Treat with biocides and stabilizers
• Maintain tanks per NFPA 110 standards

According to NFPA 110, diesel “Storage Life” is 1.5 to 2 years. Tanks should be sized so fuel is consumed within that period, or stale fuel must be replaced.

The Most Critical Step: Keep Water Out

Water is the number one killer of stored diesel fuel. It encourages microbial growth, leading to bacteria, sludge, and engine damage.

• No water = no bacteria
• No bacteria = no need for biocides

Regular fuel polishing is the most effective way to remove water, sediment, and microbes—but it can be expensive.

Deciding on Fuel Management

Consider your fuel volume:

• 200 gallons vs 5,000 gallons – costs and methods vary.
• Decide if contracting a fuel polishing service or investing in a machine makes the most sense for your operation.

Meanwhile, for small tanks, simple devices can quickly remove water and prevent early contamination.

Buy Here

For the chemical treatment to stabilize the fuel this is the BEST!

Buy Here

The post Protect Your Stored Diesel Fuel: Prevent Contamination and Engine Damage appeared first on Dieselcraft.

The color of fuel indicates the fuels age or bacteria growth. The dark color is coming from one or the other.

To fix old diesel remove the water first.

Less than 50 gallons of fuel consider Mr Funnel to remove the water.

Once the water is gone he can then filter out the solids. BUT filtering may take LOTS of filters so we are back to how many gallons do we have?

If you have an older engine with mechanical injection as long as the big solids are removed the engine will be fine…but get the water out…no engines like water.

If you have hundreds of gallons you need to use an additive to speed up the cleaning and a fuel “polishing” service or machine. http://dieselcraft.com/fuel-tank-cleaning-chemicals/

The post My Diesel Fuel is Black – Causes and Solutions appeared first on Dieselcraft.

Here are the two most common (and costly) threats to your diesel engine:

1. Water: The Silent Destroyer

Water contamination is the leading cause of diesel engine problems—and it’s more common than most people realize.

Water can enter your fuel system in several ways:

• Contaminated fuel from suppliers
• Condensation inside storage tanks
• Poor handling or storage practices

Once water is present, things escalate quickly. Microbes begin to grow at the fuel-water interface, creating sludge and producing even more water as they multiply. Left unchecked, this contamination spreads throughout your system.

When water reaches your engine, the consequences can be severe:

• Steam formation under high temperatures
• Cracked or damaged fuel injectors
• Corrosion of internal components
• Complete system failure

Important: Damage caused by water in fuel is typically not covered by warranties.

2. Fuel Contamination & Degradation

Diesel fuel isn’t as stable as many assume—it has a limited shelf life. In fact, fuel can begin to degrade in as little as 30 days, especially when exposed to:

• Heat
• Air (oxidation)
• Moisture

As diesel breaks down, it forms:

• Gum and varnish deposits
• Sediment and sludge
• Darkened, unstable fuel

This degradation feeds directly into the water problem. More contamination means more microbial growth, which leads to:

• Clogged filters
• Reduced engine performance
• Unexpected shutdowns

If not addressed early, these issues can bring your engine to a halt.

Stop Problems Before They Start

The key to avoiding diesel engine failure is early detection and prevention.

If you suspect your fuel may contain water or contaminants, don’t wait for symptoms to appear. Testing your fuel now can save you thousands in repairs later.

Dieselcraft offers fuel test kits designed to quickly identify contamination issues—so you can take action before damage occurs.

Order Test Kits or Call 530-613-2150 today to order your fuel test kit and protect your engine from preventable failure.

Bottom line: Water and contamination don’t fix themselves—they get worse over time. The sooner you detect and remove them, the longer your engine will last. BUY HERE

The post Top Causes of Diesel Engine Failure: Water Contamination & Fuel Degradation Explained appeared first on Dieselcraft.