How long do Nut oils last in the fridge once opened?
Turning the range into a date
Nut oils keep 6–8 months in the fridge once opened. Two clocks run on this item: one from the day it went into storage and one from the day the seal broke. Both are listed below, 3 rows in all.
- Unopened · in the pantryUse by6 months to 12 months after the day you bought it
- Once opened · in the pantryUse by3 months to 8 months after the day you opened it
- Once opened · in the fridgeUse by6 months to 8 months after the day you opened it
How vague the source is about this one
The source is unusually unsure about this one. Its widest range, the pantry after opening, runs from 3 months to 8 months, a factor of 2.7 between the cautious end and the optimistic one, on a figure most people read as a single number. Oil in the source list is this same food. Opening the package costs 1.5 times: 12 months sealed in the pantry, 8 months open in the fridge.
Every storage figure the USDA publishes for this item
The USDA gives this item a pantry and a refrigerator figure and no freezer figure at all, the pattern behind 79 of the 466 foods in the data. Within Baked Goods it is filed under Baking and Cooking.
- Unopened · in the pantry6 months to 12 months
- Once opened · in the pantry3 months to 8 months
- Once opened · in the fridge6 months to 8 months
Can you freeze nut oils?
The USDA prints no freezer time for nut oils. Frozen at 0 °F any food stays safe; whether they are still good after thawing is a matter of quality. Keep the fridge at 40 °F or below and the freezer at 0 °F.
How to tell if nut oils have gone bad
Go by the date first: nut oils keep 6–8 months in the fridge once opened. A sour or off smell, mold, slime or an odd color mean it goes out. The bacteria that make people sick change none of these, so past its window it goes out even if it seems fine. Never taste to test.
Sources: USDA FSIS: the danger zone USDA FSIS: freezing and food safety USDA FSIS: molds on food FDA: are you storing food safely FoodSafety.gov: the FoodKeeper app.
Is it still safe to eat, or just past its best?
The answer at the top of this page reads 6 months to 8 months in the fridge once opened. What decides that is the food and not the shelf the source files it on: Nut oils is acid, dry, sweet, alcoholic or pure fat. Past it, whether it has gone bad is yours to judge by look and smell: this window rates quality, not the day it turns hazardous.
It is past the date. Now what?
Say the calculator above puts Nut oils past its 6 months to 8 months in the fridge once opened window. Past that the calendar stops deciding and the food itself does. Mold takes the whole package out rather than the slice it grew on, and so does a musty or old-oil smell in a flour or a mix.
The whole rule, including the cases the source does not cover, is set out under what to do when the date has passed.
Two places, and one of them is the wrong one
The USDA rates two places for Nut oils in one state and they disagree: 6 months to 8 months in the fridge once opened against 3 months to 8 months in the pantry once opened. This page answers with the refrigerator, the longer of the two. Both figures are the USDA's own, so this is a choice of where to put the food rather than a disagreement about how long it keeps.
Items that behave the same way
All 6 of the 6 items nearest this item keep exactly as long as it does, 12 months, so the ranking around it is a tie rather than an order.
Where these numbers come from
Every storage time on this page is the USDA’s own published figure from the FoodKeeper data, one of the 9 it keeps per food, reproduced unchanged and never an estimate of ours. Where the USDA lists several kinds under one name, each kind keeps its own windows, and the page names the kind its answer is for. The dates and multipliers are ours, computed from those ranges.
Source: USDA FoodKeeper, retrieved 1 September 2026. Found a figure that does not match the source? Tell us on the contact page. How the site is built is on the method page.
USDA index terms: nut, oil, oils
KeepsUntil is an independent reference built on public USDA data. It is not affiliated with, endorsed by, or connected to the U.S. Department of Agriculture or the Food and Drug Administration. Whether a given window is a safety limit or a quality window is stated on the page that prints it.