Does diesel go bad?

Stored diesel used to last for years – nowadays its shelf life is measured in months. Diesel fuel eventually goes bad, that's just a fact. Three things speed up the natural process of good fuel gone bad – water, air, and warmth.

Is 10 year old diesel fuel still good?

' In reality, there is no expiration date on diesel per se, but the performance of your diesel fuel is affected the longer you store it. In fact, storing diesel without properly treating it can lead to all kinds of issues, not only for the fuelitself, but for any vehicle you decide to put the fuel in later.

How long does it take before diesel fuel goes bad?

The key is keeping the fuel cool and keeping the fuel dry. Under ideal conditions, diesel fuel can be stored between six and twelve months. To extend the life past twelve months, even under the best conditions, it needs to be treated with fuel stabilizers and biocides.


How can you tell if diesel fuel is bad?

Signs Diesel Fuel Has Gone Bad
  1. Gelling or sludge.
  2. Darker color.
  3. Sediment.
  4. Fuel filters clogged frequently.
  5. Poor fuel efficiency.
  6. Damaged fuel pumps.
  7. Harder to start machine.
  8. Black smoke.


Is it OK to use old diesel?

As for diesel, it can remain usable for between six and 12 months before becoming 'gummy' which, if used, can clog up filters and cause you issues with your engine.


What is the shelf life of petrol (gasoline) & diesel fuel? | Auto Expert John Cadogan



How do you rejuvenate an old diesel?

How to Recondition Old Diesel Fuel
  1. Pour fifty gallons of old diesel fuel into the fifty gallon drum.
  2. Measure 3.125 oz. of PRD-D or 280 oz. ...
  3. Add the fuel re-conditioner directly to the stored fuel storage if possible. ...
  4. Allow the old diesel to sit for a day or two. ...
  5. Use the fuel as if it were fresh from the pump.


What happens to diesel when it sits for a long time?

Well, without diesel fuel additives, diesel can go bad in as little as 30 days before this oxidization process becomes unwieldy, creating deposits that can damage fuel injectors, fuel lines, and other system components which will hurt fuel economy and performance.

Can bad diesel ruin your engine?

High sulfur diesel shelf life recommendations are less than a year, while ULSD and biodiesel blends have an even further reduced long-term stability. When fuel loses stability during degradation, the gums and waxes that develop can contribute to corrosion and damaging deposits on engine components.

How do you store diesel long term?

The ideal conditions for storing diesel fuel include keeping fuel dry and at a cool temperature (below 70 degrees Fahrenheit). Such conditions ensure storage life between six to twelve months. To extend fuel life beyond twelve months, fuel stabilizers are required.


How do you treat bad diesel fuel?

One Simple Solution for All Kinds of Diesel Fuel Problems
  1. ULSD (Ultra-Low-Sulfur Diesel) Sulfur Substitute Lubricant. ...
  2. Injector and Complete Fuel System Cleaner. ...
  3. UCL (Upper Cylinder Lubricant) Pump and Injector Lubricant. ...
  4. Anti-Gel Cold Flow Improver. ...
  5. Fuel Stabilizer and Conditioner. ...
  6. Cetane Booster and Diesel Treatment.


Should I keep my diesel tank full?

Regardless of the season, it's always a smart idea to keep your gas tank as full as possible. Our professionally trained personnel can deliver gasoline and diesel fuel to your farm, construction site, or commercial building should you need it. Call us at 1-800-467-5044 to learn more!

What fuel has the longest shelf life?

Propane will never go bad. It has an indefinite shelf life and will not degrade through any natural process.

How long does diesel last with stabilizer?

Use Diesel Formula STA-BIL® whenever you put your diesel fuel engine or diesel equipment in storage, specifically 1 ounce for every 5 gallons of fuel. This will keep the fuel fresh for up to 1 year.


What is a diesel bug?

Diesel bug is a single microorganism or a consortium (group) of microorganisms that grow on fuels. It includes bacteria, filamentous moulds and yeasts. They feed on the hydrocarbons in the fuel and create biomass, biofilms and damaging by-products.

How long does diesel last in a jerry can?

In general, diesel will last in a portable can for between six and 12 months before it begins to degrade. Like petrol, however, how it is stored can affect its longevity.

Does diesel injector cleaner work?

Some car owners have reported increased power after using their injector cleaner. They have reported that they recovered up to 40% of the horsepower of their engine back by applying top-of-the-range diesel fuel injector cleaner.

Can you put fuel stabilizer in diesel?

In what types of fuel can DIESEL Formula STA-BIL® Fuel Stabilizer be used in? DIESEL Formula STA-BIL® is safe to use in ALL Diesel Fuels, including Ultra Low Sulfur Diesel and Bio-Diesel blends. It is also safe to use in ANY Diesel Engine, including Marine and Agricultural equipment.


Is it legal to store diesel at home?

There are no legal requirement for how much diesel you can keep at home.

Does off road diesel go bad?

Does off road diesel go bad or expire? If you are storing off road diesel in an on-site fuel tank, you want to be mindful of how long it sits in the tank. If the fuel is untreated, it will stay fresh and usable for a year.

What will destroy a diesel engine?

As little as 1% gasoline contamination will lower the diesel flash point by 18 degrees C. This means the diesel fuel will prematurely ignite in the diesel engine, which can lead to engine damage. Gasoline contamination can also damage the fuel pump and mess up diesel injectors.

Can you get dirty diesel?

When it's fresh, there's really no such thing as “dirty” diesel fuel. When you think of dirty diesel fuel, things come to mind like unstable diesel fuel that's darkened or full of gums and sludge. Fresh diesel fuel has to meet certain legal specifications for things like water & sediment content.


Which is the best diesel fuel additive?

Diesel Extreme is the best additive in the game. This one adds seven points to diesel's cetane score (which again improves the fuel's combustion performance), and it cleans and lubricates injectors and other critical fuel system components. Diesel Extreme also helps remove excess water and contaminants from fuel.

How long does diesel last in a plastic container?

When stored under cover in sealed containers it will usually last for one year but it can last longer. The main problem with diesel fuel in opened containers is that moisture from condensation will create a favorable environment for fungus and bacteria that degrade the fuel.

Does fuel stabilizer really work?

Fuel stabilizers keep fuel fresh and effective for at least two years of storage time. Chemical reactions within stored fuel, plus the evaporation of some volatile components, can leave liquid fuels less likely to ignite properly in an engine after more than three months of storage.