Long Grove business flows best of the press by the pint
Shops that pour olive oil straight from a stainless drum, by the pint, are a lovely idea and a growing trend. But the format hides a freshness question — and the way ‘extra virgin’ gets explained on the shop floor is often quietly wrong.
The tap-oil shop is a charming format: rows of gleaming stainless drums — the trade calls them fusti — each with a spigot, and you fill a bottle with as little as a single pint of oils and balsamics from all over the world. You get to taste before you buy, and you take only what you will actually use. There is a lot to like. There are also two things worth knowing before you fall for it.
What ‘extra virgin’ really means
You will often hear, on a shop floor, that ‘virgin’ means the first cold pressing and ‘extra’ refers to the acidity that gives the oil its rich flavour. That is a muddle. Virgin means the oil was extracted mechanically, without heat or chemistry — pressed or spun, not refined. Extra virgin is the top grade: it must be free of sensory defects and fall below a free acidity of 0.8%. And here is the key point — free acidity has no taste. You cannot detect it on your tongue; it is a lab measure of how intact the oil is. Acidity does not give flavour. It is a marker of quality, not the source of it. For the fuller story, see what ‘extra virgin’ really means.
Colour tells you almost nothing
Another shop-floor habit is to judge oil by colour — gold, green, citrine. Ignore it. Professional tasters use blue glasses precisely so colour cannot bias them, because colour reflects variety and ripeness, not quality. A greener oil is not automatically better or fresher. Trust your nose and tongue: fresh oil smells grassy and alive and finishes with a clean peppery catch; tired oil smells flat, waxy or crayon-like. That is why a tap shop’s tasting invitation is genuinely its best feature.
The freshness catch of the barrel
Now the honest risk. Olive oil’s two great enemies are air and light, and a tap drum that is opened, poured and topped up all day exposes the oil to both. In a busy shop with quick turnover, kept cool and dark, this is fine — the oil moves before it can stale. In a slow one, a half-empty drum standing in a bright window is oxidising in front of you. So use the format’s own strength: taste first, buy from drums that are clearly turning over, and take a small bottle you will finish quickly rather than a heroic litre that will fade in your cupboard.
| You’ll hear | The reality |
|---|---|
| ‘Extra means the acidity that gives flavour’ | Acidity is tasteless; it is a lab quality measure, capped at 0.8% for extra virgin |
| ‘Greener oil is better’ | Colour reflects variety and ripeness, not quality — pros taste from blue glasses |
| ‘First cold press’ guarantees quality | A useful hint, but the grade is set by defects and acidity, confirmed by tasting |
| ‘Buy the big bottle, it’s better value’ | Only if you finish it fast; oil fades once opened — buy what you’ll use |
How to buy tap oil well
- Taste first — that is the whole point of the format; buy on your nose and tongue.
- Choose drums that are clearly turning over, kept cool and out of direct light.
- Buy a small bottle you will finish in a few weeks, not a litre that will stale.
- Ignore colour; ignore the acidity-equals-flavour line; judge freshness and taste.
Olive oil on tap: common questions
Does extra virgin’s acidity affect the taste?
No. Free acidity is a laboratory measure of the oil’s condition, capped at 0.8% for extra virgin, and it is tasteless. Flavour comes from the fruit, variety and freshness — not from acidity.
Is olive oil on tap fresh?
It can be, in a busy shop with quick turnover kept cool and dark. The risk is a slow-selling drum exposed to air and light all day, which oxidises. Taste before you buy.
Should I judge oil by its colour?
No — colour reflects variety and ripeness, not quality. Professionals taste from blue glasses so colour can’t mislead them.
What does ‘virgin’ mean on olive oil?
That the oil was extracted purely mechanically, without heat or chemical refining. Extra virgin is the top grade of virgin oil, free of defects and under 0.8% acidity.
How much tap oil should I buy at once?
Only as much as you’ll use in a few weeks. Oil fades once opened, so a small bottle you finish beats a big one that stales in the cupboard.
I like tap-oil shops — tasting before you buy is exactly how oil should be sold, and small pours mean fresher oil in your kitchen. But two bits of shop-floor lore make me wince. The first is the idea that ‘extra’ refers to a flavour-giving acidity: it doesn’t — acidity is a tasteless lab number, and a low one just means the oil is intact. The second is judging by colour, which pros deliberately hide behind blue glass. Use the format for what it’s worth : taste hard, buy from a drum that’s clearly moving, take a bottle you’ll finish. Do that and by-the-pint oil is a genuine pleasure. Skip the tasting and trust the patter, and you’re just buying oxidising oil with a nice story.
Drawn from olive-oil grading standards (the 0.8% extra-virgin acidity limit) and standard tasting practice.