New Soy Oil as fuel - Steel Soldiers::Military Vehicles Supersite

Polverone · 04-02-2006, 20:33

Quote:

Originally Posted by M35A2

Would using Veggie Oil,

A) Alter or destroy any rubber seals in the diesel system?

B) Destroy the F.I.P?

C) Leave a sticky residue in the fuel tank/pipes etc

D) Does it burn off cleanly, or would it carbon up the head and foul the injector nozzels?

M35A2 has some good questions and I thought I would bring this thread over here and ask a question of my own.

I was in COSTCO yesterday and checked the 5 gal. containers of Soy and Vegetable Oil. Brand new Soy Oil is $14 and change (no tax as it is a food item).

So, most of the threads deal with Biodiesel being converted after it has been used a fry oil.
Can this be used without cracking it with Methanol/lye or does it still have the glycerin in it and need the process done?

Also temperature could be a factor but:
When it gets to Memmorial Weekend around here in California, they jack the fuel rates to the moon, (have to use all the MTBE and other additives for smog BS), for the rest of the summer. That's when it is nice and hot here- aka Soy Oil time??

Please tell me I am filling up at COSTCO.

Recovry4x4 · 04-02-2006, 20:40

Gary, thats still $2.80 a gallon. Is that much of a break over regular diesel prices?

Polverone · 04-02-2006, 21:15

Right now diesel is hovering at $2.99 a gal. and some places (Malibu) it is already over $3.00. I bet it wil be $3.25 before summer hits

Katch1 · 04-02-2006, 21:32

cranetruck where are you?

Dieselsmoke · 04-02-2006, 22:32

Gary, my buddy has been running Cosco's soy oil in his '95 Dodge Cummins for quite some time now. Just dumps it in and goes, man does it make you want a hamburger though, smells soo good LOL He also runs used ATF in his other truck, simply filters it and goes. No problems so far and the trucks both dyno in the neighborhood of 450-500 HP.

gringeltaube · 04-03-2006, 00:42

I'm still running on pure sunflower oil, preheated. Next week I'll be testing fresh soy bean oil which costs about half as much as diesel.

Gerhard

cranetruck · 04-03-2006, 03:22

Gary, the cubies are actually 35 lb or 4.77 gallons for exact pricing ($2.94/gal).
Yes, you can run on this fuel for sure, but limit it to about 20% or so if you don't have a dual/heated fuel tank system.
Starting/stopping on too much veggie oil will cause coking of the injectors.
The reason for heating and/or converting the veggie oil to biodiesel is to reduce the viscosity.
There is a lot more on this in other threads. Do a search.
(A chart showing the relative viscosities below)
RME stands for Rapeseed Methyl Ester, biodiesel made from rapeseed (canola) oil.

Polverone · 04-04-2006, 08:38

Thanks for the chart, Bjorn. That really gives a visual as to viscosity values.
I'll get a couple of jugs of the stuff and "perfume" my diesel exhaust for when I get around to making a long trip.

ken · 04-05-2006, 13:43

I'vw thought about this a few times. Since the mutli can handle thicker fuels, why can't we run straight veg oil. With out heating. Bjorn, How many engine hours do you think we could go before the injectors start to clog? Do you think a injector cleaner mixed in would help?

cranetruck · 04-05-2006, 14:21

Ken, don't know about the time until the injectors start to coke up.
Coking here means that carbon builds up from unburned fuel (=poor atomization).
Without heating, you couldn't start the thing unless you live in Texas or Florida, I guess

, which brings me to a standing question I have about the fuel temp when the tank is exposed to the hot Southern sun.
Straight used veggie oil is like apple sauce when it gets down to 35-40F. No way the fliters could handle that. The IP has certain minimum specs for viscocity, but I don't know what the are. We should find out.