CASTOR MEDICINAL OIL???

CASTOR MEDICINAL OIL??? (Full Version)

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neuroza -> CASTOR MEDICINAL OIL??? (12/18/2007 3:51:34 PM)
1. ok, so one stupid question, What is castor oil??? Is that the oil You buy in medicine shop or what??? Please help because am so confused... 2. I buy some synthetic oil (for normal (big) 2 stroke motor). When I mix it with methanole all the oil drop to the bottom of Fuel Bottle - the mix is not homogenic - methanole goes up, oil drop down. Is that a problem???

pe reivers -> RE: CASTOR MEDICINAL OIL??? (12/18/2007 10:35:25 PM)
The medicinal castor oil is quite OK for mixing methanol fuel and it lubricates extremely well, though some will deny that fact. Don't listen to the nay-sayers. This oil has a few drawbacks though, like gumming up your engine. For racing, that is no problem, because you are prepared to spend some time in maintaining your engine well. Mineral oils, as well as most dyno oils will not mix with methanol as you already have noticed. These are not suitable for glow engine use. The synthetic oils (polyglycols) sold for methanol fuels have a molecular structure like vegetable oils (castor, soy bean oil etc) , so they will mix well. These oils are sold through model hobby shops. By the nature of these oils, they are limited in technical performance, though they serve us well. The above will make clear that you cannot use just any oil.

downunder -> RE: CASTOR MEDICINAL OIL??? (12/19/2007 1:03:04 AM)
I've heard that medicinal castor may have some sugar added to it to make it more palatable (yeah right :)) so personally I'd avoid it. Also, the instruction sheet for my Merco 49 explicitly warns against using medicinal castor. Castor oil is just the "juice" that gets squeezed out of the castor bean and it's totally unique. There's no other oil either natural or synthetic that has its properties. It isn't perfect but close :).

pe reivers -> RE: CASTOR MEDICINAL OIL??? (12/19/2007 1:51:22 PM)
The sugar bit is the first time I ever heard of it. Some time ago, I looked up medicinal castor, and it was classified as AA grade. This is in agreement with my personal experience. Medicinal castor has been the only oil I have used in my diesel engines before I took up RC flight. Maybe downunder sales are different, and you like it sweeter? I personally dont like to dring the stuff, and rather use it in my engines [:)]

gkamysz -> RE: CASTOR MEDICINAL OIL??? (12/19/2007 1:55:27 PM)
In the US medicinal castor is often marked USP, which is a grade suitable for human consumption. My finding of USP grade was the same as Pe's, it's just expensive. Due to strict labeling laws in the US today, any other ingredients must be listed.

pe reivers -> RE: CASTOR MEDICINAL OIL??? (12/19/2007 2:40:01 PM)
I saved part of my search for the truth in castor oil properties, from which I came out the wiser. Part 1: http://www.georgiacombat.com/CASTOR_OIL.htm http://www.castoroil.in/reference/glossary/castor_oil_usp.html (USP is 99%+ pure) Castor oil extraction, first and second pressing http://www.castoroil.in/extraction/extraction.html Part 2, went through my searches again: Baker A and Baker AA are quality standards. Medicinal is Baker AA, extra pure certified for human use First pressing oil, and went through the standard degumming (Purifying process), is also Baker AA quality, Baker A quality is second pressing, not to be preferred, and will probably flake badly.

neuroza -> RE: CASTOR MEDICINAL OIL??? (12/19/2007 4:08:04 PM)
Or thanks, this clear my confusion...

blw -> RE: CASTOR MEDICINAL OIL??? (12/19/2007 4:26:13 PM)
I replaced the bearings in the engine of a friend who added drugstore castor to his fuel. W8YE was here when we did that. You couldn't tell the difference from using castor or all synthetic when looking at it once it was disassembled. Knowing the person who owned the engine, I would bet that he didn't look to see what grade of castor he was buying. It is more expensive here if you buy it at drugstores. Personally, I wouldn't worry at all about the sugar story if I had to get mine from drugstore. Greg is right about listing ingredients on USP labeled products, but be sure that it says USP and not something like USP quality. I've seen other items with the misleading wording.

downunder -> RE: CASTOR MEDICINAL OIL??? (12/20/2007 2:00:14 AM)
Just to be a little more clear on medicinal castor (from what I understand), yes it's pure castor like we'd use in our engines but goes through a more extensive purifying and analysis to ensure there's absolutely no trace of any ricin remaining in it. Ricin is one of (if not the) most deadly poisons on the planet so if you're going to drink it......... :). But this doesn't mean that medicinal castor may not have anything added to it to make it a bit more palatable which I suspect is why Merco warns against it. On the extraction side of production there's one further step after as much oil as possible has been pressed out and that's by chemical extraction which removes the final few % from the bean which can (but not always) then be mixed with the initial pressings. Several years ago on SSW there was a discussion about the white flakes sometimes seen in fuel when it's very cold and one of the guys worked in a chemical laboratory so he had it analysed. There were traces of xylene in the oil which is one of the chemicals used in the final extraction process. I've had Castrol M cooled down to -20C in my freezer and have never seen white flakes so I can only presume it doesn't have any of the chemically extracted oil in it. Not that there's anything wrong with the chemically extracted oil unless it gets so cold it might clog up a filter or the needle valves.

blw -> RE: CASTOR MEDICINAL OIL??? (12/20/2007 2:03:25 AM)
If it is labeled as USP in the U.S., it must have all ingredients listed as Greg pointed out.

pe reivers -> RE: CASTOR MEDICINAL OIL??? (12/20/2007 1:55:05 PM)
If I understood the publications well, the chemical aided oil extraction is called second pressing. Now herein lies the problem. Sometimes it is added to the first pressing, and sometimes it is not. I have not found evidence in the AA standard that second pressing is not allowed. Maybe someone else has? Flakes not only happen in the cold. I also had an old batch of castor which in the end was not fit for use anymore (after about two years storage). No amount of filtering could remove and/or prevent new flakes from forming. Yet this oil, when fresh, served me very well. The oil was kept in a metal 5 liter jug (steel, not zinc plated).

gkamysz -> RE: CASTOR MEDICINAL OIL??? (12/20/2007 2:10:10 PM)
In my finding AA is not a standard. It was Baker's trademark product. Notice AA is ® on this site. The below site is the current owner of the Baker's trademark. http://www.vertellus.com/Market.aspx?MarketID=2 http://www.vertellus.com/Market.aspx?MarketID=2&ProductFamilyID=10

wjvail -> RE: CASTOR MEDICINAL OIL??? (12/20/2007 2:47:04 PM)
http://www.icoa.org/ICOA_index.html How 'bout joining the Castor Association? I hear they are a real fun bunch. Knock back a few pints and work on the advancement of the squeezing's of a bean!! Throw in a yearly meeting in Las Vegas and I'll be the president![:D] Teasing aside, I think there is some good information there... Bill

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