Can You Use Old Diesel Fuel?

Diesel fuel can theoretically be used after it has gone bad. Your machines, on the other hand, will go through hell.

Gelled diesel clogs filters and gets into engines, causing them to fail. Part rust and injector deposits are caused by the acids that develop in old fuel.

It’s simply not worth the danger of destroying your equipment, so keep an eye out for signs of deterioration.

What happens if I use old diesel?

It’s unlikely to take as long as you imagine. After you put fuel in a container, it only takes a few months for the quality to deteriorate — much less if the fuel is tainted in any way.

Petrol has a six-month shelf life when stored in a sealed container at 20 degrees Fahrenheit, and just three months when stored at 30 degrees Fahrenheit. The more heat it is subjected to, the faster it will blow up.

You’ll be able to maintain the container for even shorter time if it’s not well sealed, and there’ll be an elevated fire risk owing to combustible vapours escaping.

Diesel, on the other hand, can be utilized for six to twelve months before becoming ‘gummy,’ which can clog filters and cause engine problems if used.

Does diesel fuel go bad with age?

It’s an age-old question for diesel truck drivers and anyone else who drives a diesel-powered vehicle. ‘Does diesel fuel have a shelf life?’ In actuality, there is no such thing as an expiration date for diesel, but the longer you store it, the worse it performs.

In reality, keeping diesel without properly treating it can cause a slew of problems, not just for the fuel but also for any vehicle into which you chose to put it later. We’ll go over exactly what happens to untreated diesel fuel when it’s stored for a long period, as well as how you may avoid these bad consequences by simply treating the diesel before it’s stored.

Diesel fuel’s performance deteriorates when it sits in storage for extended periods of time. When the fuel reaches the final stages of the process, we call it “diesel fuel gone bad.” It may be too late to save your stored diesel fuel if you notice these things occurring to it. However, there are a few things you can do to extend its life, which we’ll go into later.

  • As a result of being exposed to environmental variables, chain reactions occur: Light, water, and heat are the most prevalent environmental variables that have a negative impact on diesel fuel. If the diesel fuel is stored in a location where any of these things might affect it, the molecules in the fuel will produce chain reactions that will cause the fuel to slowly but steadily change from an oil to a varnish.
  • The gasoline darkens, and the gums get swollen: As a result of the chain reactions that occur between environmental variables and the molecules of diesel fuel, the fuel thickens and darkens, turning into more of a gum or sludge.

This process alters the molecular structure of diesel fuel, and because most modern diesel fuels do not contain the same amount of sulfur as older diesel fuels, bacteria begin to thrive in the fuel, forming biomass. This can result in acids that completely degrade the fuel over time.

  • The sludgy fuel won’t burn properly, resulting in black smoke: This thicker, darker dieselfuel won’t run as smoothly as a diesel fuel that hasn’t been influenced by external factors, resulting in black smoke and engine sputtering, which is never good for your car.
  • Internal vehicle damage due to lubricity: Because this diesel fuel no longer has the lubricity it once did, the acidic nature and thickness of the fuel will begin to negatively affect the fuel pump, diesel injectors, and engine, and you may not be able to start your engine if the problem is severe enough.

You may be wondering if there is any solution that will allow you to keep diesel fuel without it becoming a sludgy mess now that you know what it means when you hear it has gone bad.

The solution is significantly more straightforward than you might have assumed. You can ensure that your stored diesel fuel is safe at all times by using a diesel fuel stabilizer. Although there are numerous brands and formulations to pick from, we recommend Opti-Lube, which is the world’s #1 rated additive that more than doubles the shelf life of diesel fuel.

Despite the fact that diesel fuel does not have a specific expiration date, the performance of stored fuel might be harmed over time if improper storage and additives are not used. If you intend on storing fuel or not driving your truck over the winter, it’s important to use a reliable additive like Opti-Lube and take precautions before it’s too late.

We at Gem State Diesel understand the damage that gummed-up diesel fuel can cause to a vehicle, which is why we’ve decided to offer this knowledge and show you how we maintain our fuel working at its best no matter what. After all, it’s always better to be cautious than sorry, especially when dealing with something as precious and impressive as a diesel engine.

How can you tell if diesel fuel is bad?

Depending on whether it’s bio-diesel or distillate ULSD diesel, you can only expect diesel fuel to be used for 6 to 12 months. If you’re not sure, here are some signs to look out for.

What is the shelf life of diesel fuel?

Maybe you haven’t started the hot rod in the garage in a couple of years. Maybe you haven’t used your lawnmower or snow blower since storing them for the season.

These applications that run on gasoline are all meant to make our lives easier and more fun. However, none of them will help you if the gasoline they’re utilizing is contaminated.

If gasoline is stored for too long, it might lose critical volatile chemicals due to evaporation, according to Richard Stanley, a former chemical engineer for Texas-based Fluor Corporation and Ascent Engineering.

“If you leave gasoline alone for a long time, it just doesn’t behave the way you expect it to,” Stanley explained.

Gasoline has a three-month shelf life on average, but diesel can be stored for six to twelve months if kept cool and dry. Experts agree that when keeping wasted gas for more than a year, fuel stabilizer additives should be used, and that acquiring new gas every six months (at the start of both summer and winter) is a solid rule of thumb.

That’s a lot of reminders to add to your already overflowing to-do list. There is, however, a superior fuel option available.

“While gasoline and diesel fuel deteriorate over time, propane does not,” he explained. “Unlike other fuels, it won’t decay through natural processes.” That’s why propane is an excellent choice for applications like emergency generators, which are only used once in a while.”

Propane is also ideal for lawn equipment, in addition to standby generators. The days of running your gas tank to empty before putting it away for the winter are long gone. You may simply clean up your lawn mower and store it until next spring with propane. When it’s time to clean things up, you’ll be relieved to know that your propane hasn’t gone bad. Consider these mower manufacturers if you’re ready to switch to a propane-powered mower.

Can I use 10 year old diesel fuel?

Diesel fuel can theoretically be used after it has gone bad. Your machines, on the other hand, will go through hell. Gelled diesel clogs filters and gets into engines, causing them to fail. Part rust and injector deposits are caused by the acids that develop in old fuel.

Is 10 year old gas still good?

If you haven’t driven your car in a while, you may be wondering if the gas in the tank is still OK or if it has to be removed and replaced with new gas. Here’s the answer to your question.

Is old gas in the tank bad for your car? The quick answer

In almost all cases, aging gas isn’t a problem. Gas that sits for a long time deteriorates. Gas that has been sitting for a few months, on the other hand, can be redeemed by topping off the tank with new gas. The motor will work properly once the new gas has mixed with the old gas. “The fresh gas will mix with what’s already in your tank,” explains Consumer Reports’ chief mechanic John Ibbotson, “and any fluctuation in the octane will be corrected for automatically by your car’s engine computer.” The change will restore the engine’s regular operation.

What happens when gas gets old?

When gas sits for a long time, it begins to degrade in a number of ways. Gas will lose octane over time. The combustible component of gasoline is octane. The better the air-fuel mixture and combustion in the cylinders, the higher the octane rating (think 87, 89, 93).

As gas ages, it reduces its volatility, or how explosive it is. Engine performance suffers when volatility reduces. As the engine and gas rest, residues and water from gas combustion might build up. None of this is encouraging for engine performance.

How old is too old for gas?

Degradation begins right once, but most gas remains usable for at least a month. Gas that is more than two months old, on the other hand, is generally safe to use with just small performance reductions. Engine knocking, sputtering, and clogged injectors can all be symptoms of gas that has been sitting for more than a year. To avoid engine damage, bad gas can be evacuated from the tank. One thing to bear in mind is that you can’t tell how old the gas is when you first put it in your automobile.

What does old diesel smell like?

When it breaks down, it should smell like turpentine. I would change it if you notice the odor. Algae can also grow in the gasoline.

Is diesel fuel good after 2 years?

So, under these circumstances, how long does diesel fuel last? “Diesel fuel can be stored for 6 to 1 year without substantial fuel degradation if kept clean, cold, and dry,” according to Exxon. Diesel fuel can be stored for more than a year under specific conditions, according to Chevron:

  • Second, acceptable fuel quality and stability were obtained by using additives such as biocides, stabilizers, and additive packages that promote lubricity, improve the Cetane number, and offer detergents to keep fuel systems clean.
  • Finally, the fuel was tested on a regular basis, maintained, and polished as needed using portable filters.

As a result, the answer to the question “how long does diesel fuel last” is “it depends.” However, with good fuel stability achieved by correct storage and the use of diesel fuel treatments such as Diesel STA-BIL, you can combat fuel degradation for a long time while keeping expenses low and under control.

Can bad diesel ruin your engine?

Is It Possible For Bad Diesel To Ruin Your Engine? Hard Particulate Causes Particulate Damage Moving parts in the fuel system are damaged by hard particles, causing them to malfunction. Starting difficulty, poor engine performance, idling problems, and full engine failure are all possible outcomes.