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.

What It Is

• A water‑absorbing insert designed for diesel tanks in vehicles, generators, boats, RVs, farm equipment, and storage tanks.
• Typically shaped like a pouch, sock, or small cylinder.
• Made from super‑absorbent polymers that selectively absorb water — not diesel fuel.
• Includes a retrieval cord so it can be easily removed and inspected.
• Must be checked periodically and replaced once saturated.

How It Works
Water naturally accumulates in diesel tanks through:

• Condensation
• Contaminated fuel deliveries
• Long‑term storage
  Once placed in the tank:

1. The absorber sinks to the bottom where water collects.
2. It pulls in and traps free water molecules.
3. When it reaches its rated capacity (e.g., 7.2 oz), it stops absorbing.
4. You remove it, discard it, and replace it with a fresh one.

Why It Matters
Water in diesel can lead to:

• Injector damage
• Microbial growth (“diesel algae”)
• Rust and corrosion inside tanks
• Hard starts, rough running, or power loss
• Fuel filter clogging
  A water absorber helps prevent these issues without adding chemicals to your fuel.

Typical Use Cases

• Long‑term storage tanks
• Backup generators
• Boats and RVs
• Farm equipment
• Diesel trucks that sit unused for extended periods

How to Use It

1. Drop the absorber into the tank through the filler neck.
2. Make sure the retrieval cord stays accessible.
3. Leave it in place during storage or operation.
4. Check periodically and replace when saturated.

More info at

The post Diesel Tank Water Absorbers: Protect Your Fuel and Engine appeared first on Dieselcraft.

Consider this scenario:

• A generator requires 24 hours of runtime at full load, burning 20 gallons per hour. You need 480 gallons for full coverage.
• If you run the generator 15 minutes per month, you’ll consume only about 21 gallons per year. Without a major outage, most of your fuel remains unused for 8 years.
• Even if you top off every two years with 50 gallons, the majority of the tank—430 gallons—is old fuel, now 24 months old. Adding new fuel does not fix the problem.

Why Old Diesel Fuel Is a Problem

To comply with NFPA 110 (Standard for Emergency and Standby Power Systems), fuel must remain “clear and bright” and meet ASTM D975 standards.

• After 90 days, diesel begins to discolor and solids form.
• Fuel that is no longer clear and bright can cause engine damage, clogged filters, and failed emergency starts.

Hope is not a plan.

How to Solve the Problem

The best way to maintain emergency generator fuel is:

• Regular fuel testing to monitor quality
• Fuel polishing systems to remove water and solids
• Additives to stabilize fuel and improve performance

For professional solutions, contact Dieselcraft at sales@dieselcraft.com.

The post Why You Should Worry About Your Generator’s Old Diesel Fuel appeared first on Dieselcraft.