This is not simply an obsession among experts. Olive oil is the natural juice of olives and, as a delicate product, responds to its surroundings. Light, heat, oxygen and time are its four greatest enemies. With a few simple habits, every use — from morning toast to grilled fish or a memorable salad — can retain the authentic expression of its origin.

The Four Enemies of Extra Virgin Olive Oil

The deterioration of olive oil is largely caused by oxidation. It does not happen suddenly and is not always visible, but it gradually changes the oil's aromas and flavour.

Fresh EVOO may evoke freshly cut grass, tomato leaves, almonds, artichokes or green fruit, depending on the olive variety and harvest. When stored incorrectly, these notes lose their definition and may give way to flat, waxy or rancid sensations.

Light accelerates this process. That is why leading olive oil producers protect their products with dark glass, metal tins or opaque packaging. A transparent bottle may look attractive on a shelf, but it offers little protection when exposed to kitchen light.

Heat is equally damaging. Near an oven, hob, radiator or sunny window, temperatures fluctuate and gradually compromise the oil's quality.

Very cold storage is not ideal for everyday use either. Low temperatures may cause olive oil to become cloudy or partially solidify. This does not necessarily mean that it has deteriorated, but it indicates that the oil has been exposed to conditions that are generally unnecessary.

Oxygen enters the container every time it is opened. In a large bottle that is consumed slowly, the amount of air inside increases as the oil level falls.

Finally, time takes its toll. Even the finest olive oil does not improve with age like a great wine. EVOO is made to be enjoyed fresh.

How to Store Extra Virgin Olive Oil at Home

The ideal location is a closed, clean, dry cupboard away from sources of heat.

An interior pantry is usually perfect, provided it is not exposed to moisture or strong odours.

The objective is to maintain a stable temperature, preferably around 15–20°C, although in an ordinary home avoiding extremes and constant fluctuations is generally sufficient.

Keep olive oil in its original container whenever it is made from metal, dark glass or high-quality, food-safe opaque material.

This packaging is designed to protect the oil from the mill to your table.

After pouring, replace the cap immediately and make sure it is tightly closed. Leaving a bottle open for hours may seem insignificant, but it increases exposure to oxygen.

A kitchen worktop can be convenient if you use the bottle every day and it is away from direct sunlight and heat.

However, for a large container, a multi-litre tin or a reserve bottle, the pantry is clearly preferable.

Keep only the amount you expect to use soon within easy reach and protect the rest.

Bottle, Tin or Large Container?

Each format serves a different purpose.

An opaque metal tin is one of the best options for purchasing and storing a generous quantity of EVOO because it completely blocks light and generally protects the contents very effectively.

It is particularly suitable for households that cook frequently, lovers of Spanish cuisine and anyone who wants premium olive oil for everyday use.

Dark glass combines effective protection with elegant presentation.

It is ideal for serving at the table, giving as a gift or enjoying a distinctive single-varietal oil, such as Picual, Arbequina, Hojiblanca or Cornicabra.

Transparent glass is only suitable for long-term protection when the bottle is consistently kept inside a dark cupboard, something that is often forgotten once it has been opened.

Food-grade plastic containers can be practical for larger formats, but they require additional care.

Keep them away from light and heat.

If you take a long time to finish a five-litre container, transfer a small quantity into a clean, dark bottle for weekly use. This allows you to open the main container less frequently.

Container Size Also Determines Freshness

Buying a larger format does not always mean preserving olive oil more effectively.

It depends on how much your household consumes.

A family that cooks with EVOO every day may find a three-litre tin or a five-litre tin entirely practical.

For someone who only uses olive oil for dressings or finishing dishes, a 250 ml or 500 ml bottle may help preserve freshness until the last drop.

This is particularly important with early-harvest olive oils and highly aromatic varieties.

These gastronomic treasures are produced from olives harvested at an optimal stage, delivering extraordinary vegetal character.

They deserve to be enjoyed while their aromas remain vibrant, rather than forgotten for months at the back of a cupboard.

Never refill a small olive oil dispenser without washing it first.

Old residues may be more oxidised and can alter the flavour of fresh oil.

Wash the container, dry it completely and refill it only with the amount you expect to use within a few days.

Moisture and old residues have no place in a container holding such a precious product.

Common Mistakes That Reduce the Quality of Great EVOO

Some everyday habits may appear harmless but gradually diminish the quality of an exceptional olive oil.

Leaving it beside the hob is one of them: every cooking session exposes the bottle to repeated heat.

Another mistake is displaying a bottle on a sunny windowsill for decorative purposes.

A carefully produced Spanish EVOO should never become an ornament exposed to sunlight.

It is also a mistake to assume that refrigeration is the universal solution.

Keeping olive oil in the refrigerator is generally unnecessary in a normal home.

It may partially solidify and later return to its usual appearance at room temperature, but these changes offer no particular advantage for everyday consumption.

Refrigeration may occasionally be useful in extremely hot climates when no cool, dark storage space is available.

Nor should you wait until olive oil smells unpleasant before replacing it.

The loss of quality can be gradual.

If an oil that was once fragrant begins to taste dull, greasy or lacking in character, it may be time to open a fresh bottle.

In premium gastronomy, freshness is not a minor detail: it is an essential part of the experience.

Best-Before Date and Harvest Year: What to Check Before Buying

The best-before date indicates the period during which the producer expects the olive oil to retain its optimal qualities, provided it has remained unopened and correctly stored.

It is not an immediate expiry date.

However, buying oil closer to its production season generally increases the likelihood of enjoying vibrant aromas and excellent structure.

The harvest date provides even more useful gastronomic information.

It helps you understand the actual age of the olive juice and make a more informed choice.

To enjoy intensely fruity olive oil, look for recent harvests and plan your purchases according to your consumption habits.

Keeping two bottles can be an excellent idea: one versatile EVOO for everyday cooking and another more distinctive oil for finishing dishes, serving with sourdough bread or accompanying a selection of Spanish cheeses.

A Simple Routine That Improves Every Dish

When a new EVOO arrives, decide where you will store your reserve before opening it.

Keep only the bottle you are currently using in the kitchen, away from the hob and with its cap securely closed.

When you buy more, use the oldest opened container first and avoid accumulating olive oil for excessively long periods.

Taking proper care of olive oil means respecting the work of the olive grower, the mill and the landscape that made it possible.

At Made in Spain Gourmet, exceptional EVOO is far more than an ordinary ingredient: it is one of the great treasures of Spanish gastronomy.

Store it carefully, serve it generously and allow every drop to reach the plate with the character it deserves.

Israel Romero Delcán CEO & Founder