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(Post Link) post #1 of 28 Old 12-01-14 Thread Starter
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Peanut oil in diesel

Seen a few references to peanut oil in diesel as an additive for lube etc.
So always willing to experiment i thought id try some to compare against my current millers plus 2 stroke.
So on the back it says below certain temp(5or7degc) it may go cloudy , so i left in garage and just happened to notice today on a frost (0, -1c) its gone from runny a veg oil to not so much cloudy but rock solid wax.
http://imageshack.com/a/img707/938/yauf.jpg
Now does it not do this when mixed in fuel or do you guys only use in summer months etc.
Also what sort of ml do you add per tank(50l)
Thanks for any advice.
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Strikes me the simplest thing would probably be to make up a litre of fuel with peanut oil added at ten times the likely dose and see what it does. If all is OK after a couple of frosts you know the diesel fuel changes the properties of the peanut oil sufficiently for it to not be an issue.
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Even mixed 50/50 with 2-stroke I don't get waxing until -12C and at -18C it still isn't solid but dfinitely like a gel. However this result will depend on the 2-stroke oil used as there seems to be a lot of difference in the pour point of 2-stroke oils

Pure peanut oil goes cloudy around 10C btw and is solid around 5C. If you don't want to use Peanut oil you could use rapeseed oil (canola) but I'm unsure if the cloud point is much lower, and the cetane rating is lower aswell (still around 60 though).

I add 300ml of the 50/50 mix per tank (between 50 and 60l).
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I will be mixing some trial bottles with peanut and millers, peanut millers and 2 stroke, peanut and 2 stroke.
Just wanting to hear off the guys who already use it.
I only bought it yesterday, itl have to remelt first.
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I did all this testing a couple of months ago.... started with 1l of peanut oil and 0.2l of 2-stroke, IIRC

ended with putting 50/50 mix in the wifes freezer, next to the french fries

edit:
the 5:1 mix got cloudy at 1C, and according to my notes at -18C the 1:1 mix was cloudy but liquid. In any event at that point I decided the influence of 0.6% of this mix in winterdiesel would be negligible as the cloud point for winterdiesel is -15C here although some brands go to -20C. The situation will be different in the UK.

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What are the advantages or benefits of using peanut oil instead of 2 stroke oil.?
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peanut oil goes through a transestfication when used in diesel, which heightens the cetane rating of the fuel.

2-stroke has lot of beneficial properties, but lowers the cetane rating.
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4 bottles cooling now as i had to warm the peanut oil to be able to pour.
100ml peanut oil + 50ml millers
150ml peanut oil + 50ml millers
100ml peanut oil + 100ml 2 stroke(silkolene semi syn scoot 2 , pour point -21c)
100ml peanut oil + 100ml 2 stroke + 50ml millers
Cooling outside 1.5c for now, then into freezer if no sign of waxing.
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Come the summer im going to try 100% peanut oil(300ml) then as i hadnt heard the 2 stroke lowered the cetane.
I usually do say 200ml 2 stroke + 50ml millers , so no idea if the millers increases cetane above what the 2 stroke drops it ?
On millers site
At 1ml per litre of base fuel cetane is increased by 4 numbers.
Any idea of figure for peanut oil( when diluted in tank)
Any idea of figure that 2 stroke reduces cetane .

Last edited by sussexa; 12-01-14 at 11:56.
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2 stroke lowers the cetane rating slightly, would only be an issue if the fuel you are using is only just (or not quite) meeting the spec. And make no mistake, some fuels don't meet the spec for cetane rating (50).

I'm not the one who did the research in these matters but I have contact with him. I'll try to find out.
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Quote:
Originally Posted by sussexa View Post
At 1ml per litre of base fuel cetane is increased by 4 numbers.
4 numbers or 4 points? as 4 points means 0.4
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It reads as 4 numbers, so will take 50 to 54 or 55 to 59.
My samples in freezer so far showed no solidification at -12 after hour or 2 but will recheck later on.
If these dont freeze i cant see any issue mixed in a tank of fuel.
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To finish off my tests so far, heres some vids
After 1 hour or so -12
Peanut oil mix - YouTube

And after 5 hours or so -12
Peanut oil mix 5 hours -12 - YouTube

Tipping in same order as listed above
After seeing results ill wait till warmer months to try peanut oil as last winter we had some bad weather with prolinged weeks of sub zero with peak of below -15, i dont see it worth the risk.
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won't be an issue imo as you dilute the mix 6 parts to 1000 with winterized diesel.
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just revisit this as just come across a paper on mixing oils and diesel
http://www.google.co.uk/url?sa=t&rct...VaKk350EfKgE6w
screen shots of results table
not sure if depends on base diesel cetane but for this at 55 cetane any oils seemed to reduce cetane .
Attachment 433657

Attachment 433665

Attachment 433673

Attachment 433681

Attachment 433689

Last edited by sussexa; 02-12-15 at 20:11.
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Quote:
Originally Posted by sussexa View Post
Seen a few references to peanut oil in diesel as an additive for lube etc.
So always willing to experiment i thought id try some to compare against my current millers plus 2 stroke.
So on the back it says below certain temp(5or7degc) it may go cloudy , so i left in garage and just happened to notice today on a frost (0, -1c) its gone from runny a veg oil to not so much cloudy but rock solid wax.
http://imageshack.com/a/img707/938/yauf.jpg
Now does it not do this when mixed in fuel or do you guys only use in summer months etc.
Also what sort of ml do you add per tank(50l)
Thanks for any advice.

mix it with some 2 stroke, and see the wax point temperature drop... it averages out with the other oil/diesel and since winterized diesel contains anti waxing agent it won't be a problem.
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Quote:
Originally Posted by sussexa View Post
just revisit this as just come across a paper on mixing oils and diesel
http://www.google.co.uk/url?sa=t&rct...VaKk350EfKgE6w
screen shots of results table
not sure if depends on base diesel cetane but for this at 55 cetane any oils seemed to reduce cetane .
Attachment 433657

Attachment 433665

Attachment 433673

Attachment 433681

Attachment 433689
10% is a LOT to add though, the research papers I read suggested 1000 PPM is plenty, 100ml to a tank is already 2000 ppm.
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have a read here:

www.biodiesel.org/reports/20050218_gen-357.pdf

this one is VERY interesting:
http://www.google.be/url?sa=t&rct=j&...,d.d24&cad=rja

in short: if were talking about refined biodiesel, as added to diesel in the EU, you need quitea bit to ensure you get a WSD of less than 460 m. this is the minimum lubricity required by the diesel standard, but is measured at 60c and tuned diesels will run quite a bit more. Also the repeatability and reproducability of HFRR testing is around 120m so ideally you'd want to get results below 460-120 m = 340 m.. the manufacturers of Diesel Injection Equipment recommend a WSD of no more than 400m, so you'd want to be even lower than 280m.

I'm still using my peanut oil + 2-stroke mix (with a twist) in my Giulietta, at every fill up. Although I'm running strictly in city limits these days, my regens arefar in between (400 miles or more) and I even idle the car for nearly 10 minutes in the morning, which adds soot but not miles.

also look up glycerine powered diesel engines. glycerine is what gets replaced in free fatty acids to obtain bio diesel.

longer chain fatty acids are better for lubricity, and peanut oil contains a fair amount of C20:0, longer than the tested acids in the above study. unsaturatedfatty acids are even better at lower temperatures. peanut oil has about 19% C20:0, 48% C18:1 and about 33% C18:2.

Last edited by Cuore_Sportivo_155; 24-12-14 at 19:25.
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I ran all of those mixes although I may have mixed and split some cant remember now.
ricinoleic acid looked the best in those tested ? castor oil ? have you tested castor oil as well as peanut oil ? chemistry appears easy to you , if you say peanut oil is best we can add ill stick with that.
for this winter im on a mix of 2 stroke, 2-ehn, plus some bg244 and millers in small quantities.
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castor oil can gum up.

from the commercially available oils, peanut oil is the best. the others are corn oil, and rapeseed oil.

I'm not using any cetane boosters besides what's in the fuel already. 2ehn is also a solvent, used in most fuel system cleaners. You can definitely overdo 2ehn

https://www.google.be/url?sa=t&rct=j...ceBHYQCvg07uhA here you can find what the possible issues with 2ehn are. attacks copper and mild steel, eats certain seals and gaskets. Page 10 of the document.

Last edited by Cuore_Sportivo_155; 25-12-14 at 07:34.
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thanks for those links
the 2ehn bottle has these usage recommendations
For pump diesel add 2-EHN to diesel fuel at a ratio of 1,000:1 up to 500:1 for maximum performance increase (50-100ml per 50 litres of fuel). Use up to 350:1 for poor quality biodiesel
so for my 55ltr tank
my last tank was
250ml 2stroke so 220:1
100ml 2-ehn so 550:1
50ml millers so 1100:1
30ml bg244 so 1833:1
I suppose the millers has some 2-ehn also , so next mix ill try 50ml 2-ehn and 50ml millers.
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which millers product are you using?

this is (part of) what's in BG244

PETROLEUM DISTILLATES 15-40 %
MINERAL SPIRITS 15-40 %
2-ETHYLHEXYL NITRATE 10-30 %

all solvents, the petroleum distillates and mineral spirits are white spirit and kerosene most likely.


if you're using DIESEL POWER ECOMAX, you're adding again over 50% 2ehn, and I think the remainder is isoprene, made from D-limonene

Last edited by Cuore_Sportivo_155; 25-12-14 at 21:23.
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Good spot
Ill drop my percentages itl all last longer anyway.
I was thinking the bg244 was all injector cleaner and the millers i was just adding to use it up.
I suppose the systems had a pretty high dosage.
I might do a stock tank of v-power to clear out ready for next mix.
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just bought some acetone to clean upvc windows and doors.
anyone got info on to add to diesel or not ?
ive heard about it before im sure but never had any to test.
thanks

edit after advice and further online research the cons look to be not worth the pros which are not proven so ill not be testing acetone.

Last edited by sussexa; 14-05-15 at 08:25.
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Chuckling away to myself just now thinking......does peanut oil make it smell nice?
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