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Old 09-09-2014, 12:21 PM   #15
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Maybe I can add some light to this discussion having worked in a refinery
for 40 years. Diesel is still made the same way with blends of kerosene. The low
sulfur diesel is a step after it is blended to meet EPA spec's. The shipping terminals
do the blending for seasonal use. The bio is added at that time, there are no federal
specifications what the bi can be made of. It might be chicken fat from huge producers to soybean oil. One thing taking the sulfur from diesel is like taking lead
from gasoline. Older diesels will need a additive for pump and injector lubrication.
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Old 09-10-2014, 07:54 AM   #16
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Quote:
Originally Posted by midgt89 View Post
Maybe I can add some light to this discussion having worked in a refinery
for 40 years. Diesel is still made the same way with blends of kerosene. The low
sulfur diesel is a step after it is blended to meet EPA spec's. The shipping terminals
do the blending for seasonal use. The bio is added at that time, there are no federal
specifications what the bi can be made of. It might be chicken fat from huge producers to soybean oil. One thing taking the sulfur from diesel is like taking lead
from gasoline. Older diesels will need a additive for pump and injector lubrication.
Lead was added as an anti-knock product, not a lubricant. Then it was only added after engines became "high-compression" engines. Sulfur is naturally occurring in base stock, and was never added. Bio-diesel in added now to replace the lost lubricity from removing sulfur. Today's diesel fuel meets the same lubricity standards that have been observed for 20 years.
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Old 09-10-2014, 09:51 AM   #17
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Lead was added to raise octane to prevent knocking in higher compression engines,
lead also had natural lubricating properties. Look at the problem older engines had when they did away with leaded gasoline. The same thing is happening with sulfur
in diesel fuel.

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Old 09-10-2014, 07:26 PM   #18
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I've been making my own diesel from waste motor oil for the past 3 years and have run roughly 50K miles in a 7.3 PSD, a 7.3 IDI, and a Cummins 8.3.

It's been a learning experience but I haven't broken anything major, have since refined the entire process, and have saved a good bit of money the past few years.

The 8.3 is in my Rexhall 38' DP and we completed a ~3700 mile trip this summer, all for about $250
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Old 09-10-2014, 07:30 PM   #19
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It sounds like you may carry fuel with you considering a 3700 mile for $200. Do you carry it or produce it on the road?

I'm not in a position to make it, however, am very intrigued by the process and the ingenuity.


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Old 09-10-2014, 07:37 PM   #20
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Yes, I carry a tote (275 gals) on a small 4x6 trailer for the short trips and an enclosed car hauler for the longer trips. On this trip, I used the 4x6 along with a few buckets of fuel in the bay storage areas.

I centrifuge my fuel excessively which keeps me from producing it on the road....it's definitely possible but it's easier to do it all at home and just fill the tote.
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Old 09-10-2014, 08:17 PM   #21
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Any photos of the process?


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Old 09-12-2014, 09:23 AM   #22
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Unfortunately I don't, I keep saying that I'll take some but never do. I'll be processing a 250 gallon batch in a few weeks, I'll take photos then to share.
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