Recent Topics
Is radius rod same thing as sway bar
by Vikas
10/24/14 11:35 AM
window tinting: outside or inside
by friendly_jacek
10/24/14 10:11 AM
NYC police officer injured after hatchet attack.
by dave1251
10/24/14 10:11 AM
Triumph Herald
by Stelth
10/24/14 09:43 AM
I have a Royal Purple filter on since 1/29/2013
by cutter
10/24/14 09:37 AM
Conoco Philips 5W30 synthetic blend in Honda Gen
by lexus114
10/24/14 09:32 AM
Home AC condenser fins
by ARB1977
10/24/14 08:27 AM
Havoline OAT Coolant substitute?
by dan87951
10/24/14 08:00 AM
Pennzoil Spring FRN changed! Codes invalid
by Scott_mi
10/24/14 07:59 AM
Wix 57202 filter: 9k miles over 3 years
by dnewton3
10/24/14 07:19 AM
New computer build
by Colt45ws
10/24/14 07:18 AM
Stabil 360
by RamFan
10/24/14 06:34 AM
Newest Members
Dumy, SethTanner, mrfitz, 69P, newbull87
51678 Registered Users
Who's Online
101 registered (Apollo14, aquariuscsm, 95MarkVIII, 901Memphis, ARCOgraphite, 55Test, 5 invisible), 1866 Guests and 229 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51678 Members
64 Forums
221145 Topics
3496221 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Topic Options
#1261718 - 10/20/08 02:32 PM Cooking oil viscosity (seriously)
addyguy Offline


Registered: 09/08/05
Posts: 13429
Loc: Canada
I know this sounds like a joke/troll thread, but its not.

What viscosity would a typical cooking oil be, or be 'equivalent to'?

I was making some eggs the other day, and took our bottle of vegetable oil out of the fridge. The fridge is probably about, what, 3-7 degrees C? The oil pours easily out of the bottle. It got me thinking: This oil probably doesn't stop pouring until about -10 to -15 degrees C, so it would be equivalent to about a 20W oil, or something like that. Obviously, as you heat the oil, it thins, so what viscosity would it be at 100C? Would it be like a 20W-30? 10W-30?

I know they 'hydrogenate' oil to make it 'useable' as food; is this similar to 'hydrocracking' a petroleum oil, to give it better viscosity characteristics? Forgive me if this is a really, really dumb question!
_________________________
2003 Mazda Tribute LX V-6, 172k miles.
Oil: QS Defy 5W-20; Fram Ultra XG2 filter.

Top
#1261756 - 10/20/08 03:13 PM Re: Cooking oil viscosity (seriously) [Re: addyguy]
TallPaul Offline


Registered: 10/22/03
Posts: 12915
Loc: By Detroit
Corn oil is 8.6 cSt at 100C, so like a 20 weight.

Viscosities of many substances.
_________________________
"There is a slight vibration in it that I always attributed to something I can't explain." --Neil Young

Top
#1261794 - 10/20/08 03:49 PM Re: Cooking oil viscosity (seriously) [Re: TallPaul]
Tom NJ Offline


Registered: 07/27/06
Posts: 1628
Loc: New Jersey & Virginia
Vegetable oils have different freeze points depending on the amount of saturated fats and monounsaturates. Olive oil will freeze to a wax like substance in the refrigerator, while oils with a lot of polyunsaturates like corn oil will not. The VIs of vegetable oils are very high, often near 200, but they are not very oxidatively stable due to their unsaturated acids.

Mild hydrogenation of vegetable oils will lighten the color. If you hydrogenate it more you will raise the freeze point by increasing the level of saturates and monounsaturates. Raise the freeze point above ambient and you have margarine or shortening. Hydrocracking is much more severe.

BTW, you should keep your refrigerator below 38F (3.3C) to inhibit the growth of botulism spores, although such an occurrence would be very very rare. The colder the refrigerator, the longer food will last.

Tom NJ

Top
#1261813 - 10/20/08 04:19 PM Re: Cooking oil viscosity (seriously) [Re: Tom NJ]
Malo83 Offline


Registered: 08/08/08
Posts: 1047
Loc: Cali
And the colder the better for those Bud Lites...

Top
#1262018 - 10/20/08 08:22 PM Re: Cooking oil viscosity (seriously) [Re: Malo83]
BearZDefect Offline


Registered: 08/15/05
Posts: 1934
Loc: Lexington, KY
Hydrocracking petroleum oil yields a good base for lubricating oils.

Hydrogenating vegetable oils yields fats that are not so good for the human body. Better to eat butter if you want it saturated.

You already knew that. But the medical establishment told you the contrary for decades, only acknowledged their folly a few years ago.

Food processors often choose their oils (additives ;\) ) for characteristics mentioned above, such a resistance to waxiness when cold, or they hydrogenate the oil to give the final product a desired texture/feel. But above all, and understandably, price drives their choice.

The price of vegetable oils at the grocery store doubled less than a year ago. I've been waiting for it to ease down a bit, but it hasn't.

You already know all that, so I'll stop.

Top