How long is oil good for?

Default <[email hidden]> wrote in
:"]news:[email hidden]:

Quoted message said:

I'm using canola oil in a deep fry machine to make french
fries... how long should I keep/reuse the oil? Is it more
a function of use or time? Is there an easy way to tell
when the oil needs to be changed?

If the oil smells off. If the oil smokes excessivly. If the
oil is way darker than when it frirst went in the deep
fryer and if the oil has absorbed a flavour from the foods
cooked (ie fish). Canola oil is normally good for about a
year. But frying at temps near it's smoking point lowers
it's smoking point.

--
Once during Prohibition I was forced to live for days on
nothing but food and water.
--------
FIELDS, W. C.

hahabogus said:

If the oil smells off. If the oil smokes excessivly. If
the oil is way darker than when it frirst went in the deep
fryer and if the oil has absorbed a flavour from the foods
cooked (ie fish). Canola oil is normally good for about a
year. But frying at temps near it's smoking point lowers
it's smoking point.

Does the oil have to be refrigerated?

~john

Levelwave© <[email hidden]> wrote in
:"]news:[email hidden]:

Quoted message said:

hahabogus said:

If the oil smells off. If the oil smokes excessivly. If
the oil is way darker than when it frirst went in the
deep fryer and if the oil has absorbed a flavour from the
foods cooked (ie fish). Canola oil is normally good for
about a year. But frying at temps near it's smoking point
lowers it's smoking point.

Does the oil have to be refrigerated?

~john

No, just store the oil in a cool place out of direct
sunlight.

--
Once during Prohibition I was forced to live for days on
nothing but food and water.
--------
FIELDS, W. C.

Default said:

I'm using canola oil in a deep fry machine to make french
fries... how long should I keep/reuse the oil?

Those are two VERY different questions.

Canola oil in the original sealed container will last years.
After opening unused canola oil still in the container will
last a few years.

The best length of time to use oil in a deep frier is once.
Every time oil is heated it has more transfats. So ideally
use as little as you can and change it daily. As a practical
matter consider changing some of it daily. The more you
change the better the fries.

In article <[email hidden]>,

Default said:

I'm using canola oil in a deep fry machine to make french
fries... how long should I keep/reuse the oil? Is it more
a function of use or time? Is there an easy way to tell
when the oil needs to be changed?

Summary of info from "How to Read a French Fry":

avoid oxygen, light, and moisture--store in the smallest
container it'll fit in, and in a cool, dark place.

Discard when the smoke point drops to close to the frying
temperature, or when it develops off-odors, or becomes
noticeably darker than unused oil.

The book also recommends adding a tablespoon of old (not
rancid) oil to each cup of new--saying that brand-new oil
doesn't cook as well as oil that's broken in a little.

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