The Wrong Fuel Additive Cost $30K in Engine Damage

The chief engineer added a combustion improver to reduce exhaust smoke.

But the additive wasn't compatible with their fuel purifier system.

The result: injector fouling and $30,000 in repairs.

The Incident

Vessel: MV Atlantic Star

Problem: Excessive exhaust smoke

Solution Attempted: Combustion improver additive

Result: Catastrophic injector fouling

Timeline:

Root cause: Additive caused purifier inefficiency → cat fines passed through → injector destruction

The Fatal Mistake

What They Did

What They Didn't Do

Why It Went Wrong

The Additive-Purifier Interaction

The combustion improver altered fuel viscosity characteristics.

Their purifier, optimized for untreated VLSFO, couldn't maintain proper separation with the additive.

Result: Cat fines that should have been removed passed through to the engine.

The Compound Effect

The additive solved one problem but created a bigger one.

When Additives Are Worthwhile

Good Use Cases

|-----------|--------------|---------|

Wrong Use Cases

|-----------|---------|--------|

The Additive Selection Protocol

Step 1: Identify the Real Problem

Before adding anything:

Additives treat fuel problems—not mechanical issues.

Step 2: Check Compatibility

Verify with:

Step 3: Trial First

Step 4: Document Everything

The Additive Safety Checklist

Get the Fuel Additive Safety Kit:

[Download the Free Additive Safety Kit]

Key Lessons

$30,000 in engine damage from a $500 additive purchase.

Test first. Verify compatibility. Monitor results.

Don't gamble with your engine based on catalog promises.