How Long Can I Store Diesel

So, there I was, out in the middle of nowhere, my old diesel pickup truck chugging along like a champ. I'd been meaning to ask, how long can you actually store diesel, you know, before it goes all wonky on you? I mean, I've got this old jerry can sitting in the shed, and I'm not sure if it's still good or if it's turned into some sort of diesel soup by now.

Anyway, back to my story. I was out there, under the big blue sky, when suddenly, my truck started coughing and spluttering like it had a bad case of the flu. I thought to myself, "Self, you should really look into this diesel storage thing." So, here we are, let's dive into the fascinating world of diesel storage, shall we?

First Things First: What's in Your Diesel?

Before we get into how long you can store diesel, let's talk about what's actually in it. Diesel is a complex mixture of hydrocarbons, and it's not just the stuff that comes out of the pump at the gas station. It's got additives in it to make it burn cleaner, and some of these additives can start to break down over time.

Now, you might be thinking, "But I've heard that diesel can last for years!" And you're not wrong. But the thing is, it's not just about the diesel itself. It's about what's in the tank with it. Water, for instance, is not your friend when it comes to diesel storage. It can cause all sorts of problems, like microbial growth and rust. More on that later.

So, How Long Can You Store Diesel?

Alright, let's get to the million-dollar question. The short answer is, it depends. It depends on the quality of the diesel, the storage conditions, and how well you've taken care of it. But let's talk about some general guidelines.

For diesel that's been treated with additives to prevent bacterial growth and rust, you're looking at a shelf life of about 12 months when stored at temperatures between 40°F and 80°F (4°C and 27°C). If you're storing it in a cool, dark place, like a basement or a shed, you might be able to stretch that out to 18 months or even two years.

But here's the thing, time is not your friend when it comes to diesel storage. The longer you store it, the more likely it is to start breaking down. And once it starts to break down, it's not just about the diesel not working in your engine anymore. It's about the gunk it leaves behind that can clog up your fuel system.

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What About Ultra-Low Sulfur Diesel?

You might be wondering about ultra-low sulfur diesel (ULSD). This is the type of diesel that's been the standard in the U.S. since 2006. It's got less than 15 parts per million of sulfur in it, which makes it better for the environment, but it also means it's more prone to degradation.

ULSD can start to degrade in as little as six months when stored at room temperature. So, if you're using ULSD, it's even more important to use it up within a year, or to store it properly if you're not going to use it right away.

Proper Storage: The Key to Long-Lasting Diesel

Alright, so you want to store your diesel properly. What does that mean? Well, it means keeping it in a clean, dry, and cool place. A dark place is also a good idea, because sunlight can speed up the degradation process.

It also means keeping water out of your diesel. Water can get in through condensation, so it's a good idea to use a fuel stabilizer that also contains a dehumidifier. And it means using a fuel that's been treated with additives to prevent bacterial growth and rust.

Oh, and one more thing. If you're not going to use your diesel within a year, it's a good idea to run your vehicle regularly to keep the fuel moving through the system. This can help prevent the buildup of gunk and keep your engine running smoothly.

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When in Doubt, Drain It Out

Alright, so you've stored your diesel properly, but it's been a while since you've used it. How can you tell if it's still good? Well, there are a few signs to look out for.

If your diesel has a foul smell, or if it looks cloudy or has a rainbow sheen to it, that's a sign that it's starting to break down. If you see any sediment or water in the bottom of the tank, that's also a bad sign.

If you're not sure, it's always better to err on the side of caution and drain the fuel. It's not worth risking your engine to save a few bucks on fuel. Plus, it's not like diesel is going to go bad overnight. If you're not sure, just use it up within a year, or store it properly if you're not going to use it right away.

So, What Happened to My Truck?

Oh, right. My truck. Turns out, the diesel in my jerry can had gone bad. I should have known better, really. I'd had it sitting in the shed for who knows how long. I ended up having to drain the tank and clean it out before I could fill it up with fresh diesel and get back on the road.

But hey, live and learn, right? At least now I know how to store diesel properly, and I won't make the same mistake again. And neither will you, now that you've read this article. So, go forth, store your diesel wisely, and happy driving!