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Old 10-05-2005, 05:48 PM   #1
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cool article on biodiesel lubrication qualities

I just read an interesting article on biodiesel related to it's use as a lubricating agent in injectors and pumps. The gist of the article is that as the EPA restricts the amount of sulfer and other aromatics in diesel the lubricating qualities of diesel go down proportionally. I had been warned of this previously and it was suggested that a quart of motor oil be added to my 40 gal tank with each fill up to preserve the injector and pumps. with the addition of minimum 2% biodiesel you retain enough lubricant qualities to preserve your expensive injectors and pumps. here's the link to the article, thought you might find it interesting.

http://www.biodiesel.org/pdf_files/f.../Lubricity.PDF

The website also lists places you can buy biodiesel from the pump but I don't live anywhere close. Bakersfield CA is the nearest metro area to me and it was built on oil and rednecks so not expecting to see any real soon
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Old 10-05-2005, 08:46 PM   #2
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I just checked on soybean oil spot prices. 24.31 cents per pound. That works out to roughly $1.83 per gallon. Cheaper than diesel!

Of course, you have to buy 60,000 pounds at a time! That's about 8,000 gallons, and would cost a bit under $15,000.

That's good to know about the motor oil. I'm thinking of converting my bus in the near future, and I'll remember to put a quart of motor oil in every 50 gallon tank.

Reckon you can use filtered USED motor oil? That's free, too!
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Old 10-05-2005, 08:54 PM   #3
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trentet -- go back and read that again. I just had to read it several times before I got it (I think).

Quote:
“….we have tested biodiesel at Stanadyne and results indicate that the inclusion of 2% biodiesel into any conventional diesel fuel will be sufficient to address the lubricity concerns that we have with these existing diesel fuels . From our standpoint, inclusion of biodiesel is desirable for two reasons. First it would eliminate the inherent variability associated with the use of other additives and whether sufficient additive was used to make the fuel fully lubricious. Second, we consider biodiesel a fuel or fuel component—not an additive…Thus if more biodiesel is added than required to increase lubricity, there will not be the adverse consequences that might be seen if other lubricity additives are dosed at too high a rate.” The reasoning behind
They're saying biodiesel makes existing diesel more lubricious, not the other way around. They recommend adding 2% biodiesel TO the 98% diesel fuel.

Which makes me feel better about planning to run straight WVO.

EDIT... Wait, I misread what you said. You're saying add 2% biodiesel to WVO, and you'll have enough lubricity?

I gotta read everything again.
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Old 10-06-2005, 12:01 AM   #4
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I don't know if it is true but I have heard some old truckers say motor oil has more sulfur. So adding it will do some good as far as lube. My great uncle who is a retired trucker/diesel mechanic always filters his motor oil and adds it to his tank in small quantities. He has over 200k miles on his dodge truck and the egine runs great.
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Old 10-06-2005, 12:38 AM   #5
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ok, here's what I was trying to say

The article stated that adding 2% biodiesel to traditional diesel fuel will improve lubricity. The gist is that traditional diesel, as is, has too low a lubricity at this time due to the removal of sulfur for EPA requirements. This situation is going to get worse as EPA requirements become more strict. I have been dealing with this situation by adding a quart of motor oil to the tank before I add a full tank of regular diesel fuel. I don't have access to biodiesel, mores the pity, because I live in redneck central of California. I don't want to deal with the mess of filtering and heating vegetable oil and running it through my bus so the free fry oil option is out. As to purchasing lots of soybean oil there is still the issue of converting it to biodiesel. You see biodiesel isn't just the veggie oil itself but that oil with the glycerin stripped out of it using a process that involves either propane or methane. I read an article once in a sci fi magazine about it. Apparently you can convert any fat to biodiesel animal or vegetable by using this method. If you are interested in the article I can cut it out and post it.
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Old 10-06-2005, 10:32 AM   #6
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I've heard of putting transmission fluid in diesel but I never heard of using motor oil. Has anyone else heard of this or was I misinformed?
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Old 10-06-2005, 01:12 PM   #7
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In Minnesota, you will soon not have a choice - all diesel will be required to add 2% biodiesel. My understanding is that at that concentration, it won't attack the older rubber fittings.....

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Old 10-07-2005, 12:45 AM   #8
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Yes some use ATF to lube and help keep the injectors clean.
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Old 10-12-2005, 03:53 PM   #9
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I see what the article is saying now. Running straighth WVO or bio-diesel should be plenty lubricous. I'm hoping to start a WVO conversion soon, but to only use WVO for a few months. Then I hope to set up a small batch processing biodiesel refinery that would allow me to process about 25 gallons of biodiesel a week.

I was pricing the SVO for use as straight fuel, without refining. Refining it would add about another 40 to 60 cents per gallon (based on purchasing methanol in the neighborhood of $2.00 per gallon...again, buying in bulk...over 200 gallons at a time).
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Old 10-12-2005, 04:31 PM   #10
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but once you pull the glycerin out you can make it into soap pretty easy..then you can clean up the mess you made *S*
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