If your business relies on diesel—whether for vehicles, machinery, or backup generators—you’ve probably asked:
“How long can diesel fuel sit before it goes bad?”
Let’s break it down.
How Long Does Diesel Fuel Last?
In ideal conditions, diesel fuel can last 6 to 12 months.
But in the real world? Moisture, temperature, and storage quality often shorten that shelf life.
If not stored properly, diesel can degrade, causing:
- Filter clogging
- Injector damage
- Engine trouble
- Costly downtime
What Affects Diesel Shelf Life?
Here’s what causes diesel to break down faster:
- Exposure to air and moisture → leads to microbial growth (aka “diesel bugs”)
- Fluctuating temperatures → create condensation inside tanks
- Dirty or old storage tanks → contaminate fresh fuel
No additives → no defense against oxidation or gelling
How to Store Diesel Properly in Toronto
- Use high-quality tanks: Invest in sealed, weather-resistant tanks made for fuel.
- Keep tanks full: Less air inside = less condensation.
- Store in cool, shaded areas: Avoid direct sunlight and extreme temps.
- Add stabilizers: Fuel additives extend life and prevent gelling in colder months.
- Inspect regularly: Check for rust, leaks, or signs of microbial growth.
How Lambert Oil Helps
We don’t just deliver fuel—we guide our customers on safe, efficient storage practices.
Whether you’re storing dyed diesel for equipment or clear diesel for road use, we’ll help you protect your investment.
Need reliable delivery or storage advice?
Contact us
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