Quality & testing
Cloudy or clear olive oil: which is right
Cloudy is not a sign of spoilage. Nor is it a sign of quality.
18 October 2026 · 2 min read
Olive oil can look cloudy for two entirely different reasons, and both are normal. It can also turn cloudy for a third reason that is not. It is worth knowing which.
First reason: it is unfiltered
After the oil is separated from water and solids, some producers filter it and some do not. Unfiltered oil keeps tiny particles of olive fruit suspended in it, and that makes it look cloudy.
There are arguments on both sides. Unfiltered oil often has a fuller flavour at first. But those particles settle to the bottom over time, and the sediment can accelerate deterioration — oil left too long on its sediment develops a flavour defect called muddy sediment.
Filtered oil keeps longer and more predictably. Both can be excellent extra virgin.
Second reason: it is cold
Olive oil contains a mix of fats with different melting points. As the temperature drops, some begin to solidify before others, and the oil turns cloudy or forms white clumps.
This is entirely normal and completely reversible. Leave the bottle at room temperature and it will clear again within a few hours.
In Malaysia this rarely happens unless you keep the oil in the fridge or a very cold air-conditioned room. And there is no need — olive oil does not require refrigeration.
Important: this is not an authenticity test
There is a widespread claim that genuine olive oil solidifies in the fridge and fake oil does not. This is not true.
The fat mix varies by olive variety, region and harvest season. Some genuine oils never solidify at fridge temperature; some blends solidify beautifully. The International Olive Council does not recognise this test.
The third reason, which is not normal
If the oil is cloudy and also smells wrong — vinegar, wine, mud, or damp earth — that is neither filtration nor temperature. That is a defect, and it means fermentation happened before pressing or the oil sat too long on its sediment.
Your nose is the test here, not your eyes. Cloudiness alone tells you nothing; cloudiness plus a wrong smell tells you a great deal.
