Is there an olive in your oil?
Choosing olive oil looks harder than it is, mostly because the label is designed to confuse you. Strip away the marketing and three things decide quality: the grade, the freshness, and whether the oil was ever really made from olives at all.
Cooking well is a string of small, honest choices, and the fat you reach for is one of the biggest. For a lot of dishes that fat is olive oil — deservedly, because good extra virgin is delicious and rich in the monounsaturated fat that has kept it on the healthy list for decades. But ‘olive oil’ is not one thing. It ranges from a green, living juice pressed from fresh fruit to a bland, industrially treated liquid that has had every fault stripped out of it. The label rarely makes the difference obvious, so you have to know what to look past.
Read the grade, ignore the colour
The single most useful word on the bottle is the grade. Extra virgin is the top tier: mechanically extracted without heat or solvents, low in free acidity, and free of tasting defects. Plain ‘olive oil’ or ‘pure olive oil’ is usually refined oil — stripped and deodorised — with a little virgin blended back for flavour. It is not poison, but it is a lesser thing sold at a hopeful price. And ignore colour entirely: professional tasters use coloured glasses precisely so that a green oil cannot fool them into thinking it is better than a golden one. Colour tells you about variety and ripeness, not quality.
Freshness beats prestige
Olive oil is a fruit juice, and like all juice it fades. A celebrated region on the label means nothing if the oil is two years old and has sat under supermarket lights. The number that matters is the harvest date — not a ‘best before’ two years out, which tells you the packing line, but the actual season the fruit was picked. Buy the most recent harvest you can find, in dark glass or tin, and store it cool and away from light. A modest oil pressed a few months ago will beat a grand one that has quietly gone tired.
The adulteration question
Then there is the oldest trick in the trade: oil that is not really, or not only, olive oil. Because good extra virgin costs real money to make, some bottles are cut with cheaper seed oils, or built from low-grade oil dressed up with colour and a flag. This is exactly why the grade, the seal and the origin matter together — and why a suspiciously cheap ‘extra virgin’ deserves suspicion. If you want the mechanics of how this is done, we lay it out in how olive oil is cut and in what ‘bottled in Italy’ actually means.
| On the label | What it usually means | Worth buying? |
|---|---|---|
| Extra virgin + harvest date | Fresh, unrefined, graded | Yes — the target |
| ‘Pure’ / ‘olive oil’ | Mostly refined, some virgin added | Only for high-heat frying |
| ‘Light’ olive oil | Refined, light in flavour not calories | Skip — a marketing grade |
| Very cheap ‘extra virgin’ | Possibly old, blended or cut | Treat with suspicion |
| ‘Bottled in Italy’ | Bottled there, grown anywhere | Origin unknown — check further |
- Buy on grade + harvest date, never on colour or a pretty bottle.
- Choose dark glass or tin and store it cool and dark.
- Keep a good extra virgin for finishing and a cheaper oil for high heat.
- Be wary of a bargain ‘extra virgin’ — quality has a floor price.
Choosing olive oil: common questions
Is greener oil always better?
No. Colour reflects variety and ripeness, not quality — which is why professional tasters judge from coloured glasses that hide it.
What does ‘pure olive oil’ mean?
Usually refined oil with a little virgin blended back for taste. It is a lower grade than extra virgin, despite the reassuring word.
Should I cook with extra virgin?
You can, and it is fine for most home cooking, but its finest aromas are wasted by high heat. Finish with it; fry with something plainer.
Why does harvest date matter more than ‘best before’?
Olive oil is a juice that fades. The harvest date tells you how fresh it truly is; a distant best-before only tells you when it was packed.
Can olive oil be faked?
Yes. Cheaper oils are sometimes blended in or dressed up with colour and origin claims, which is why grade, seal and a fair price matter together.
After twenty years of this, my shopping rule fits on a matchbook: read the grade, find the harvest date, buy the freshest, keep it in the dark. Everything else on the label — the medals, the Tuscan sunset, the word ‘pure’ — is there to sell you a feeling. A plain, honest, recent extra virgin beats a prestigious tired one every single time, and it usually costs less too.
Drawn from olive oil grading standards and long experience of how bottles are labelled and sold.