Diesel & Kerosene Fuel Storage Guide

Diesel and kerosene are middle-distillate fuels. They are more stable than gasoline but still degrade over time.

How Long Does Diesel Fuel Last Without Treatment?

Untreated ultra-low sulfur diesel (ULSD) typically lasts:

• 6–12 months under ideal storage conditions
• Less when there’s heat, oxygen exposure, or moisture contamination

Degradation leads to:

• Sludge formation
• Asphaltene dropout
• Injector deposits
• Reduced combustion efficiency

The Lubricity Problem in ULSD

Modern ULSD has reduced natural lubricity due to sulfur removal. Reduced lubricity can increase wear in:

• Injectors
• High-pressure fuel pumps
• Precision fuel system components

PRI-D contains a lubricity component in addition to oxidation control.

This is one of the key differences between PRI-D and many retail stabilizers.

How PRI-D Extends Diesel Storage Life

PRI-D works by:

• Interrupting oxidation chains
• Improving combustion efficiency
• Reducing carbon formation
• Supporting lubricity in modern diesel systems
• Helping restore degraded fuel (within limits)

Manufactured by Power Research Inc., PRI-D is used in bulk tanks, agriculture, marine, fleet, and generator storage.

Kerosene Storage

Kerosene can last 1–5 years in clean, dry storage. However, long-term storage may still result in:

• Oxidation
• Sediment formation
• Water accumulation

Because kerosene is a middle distillate fuel, PRI-D is generally the appropriate stabilization option.

Can PRI-D Be Used in Gasoline?

In an emergency, yes.

PRI-D can be used in gasoline if PRI-G is unavailable. However, it is not optimized for control of gasoline volatility.

For gasoline storage, use PRI-G.

If gasoline is part of your inventory, explore performance documentation on the PRI-G fuel stabilizer reviews and aged gasoline treatment page.

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👉 Fuel Storage Education Center 
👉 PRI vs Retail Stabilizers