Cummins approves up to B05 for the older engines.
What is Cummins position on biodiesel fuel? Biodiesel blends up to B5 are
approved for use in all Cummins engines for both on-highway and off-highway
engines. B5 is a blend of 5 percent pure biodiesel and 95 percent standard
petroleum diesel. Cummins believes that blends greater than B5 are possible
and appropriate. The industry standard known as ASTM D6751 defines the
specifications for B100. However, this standard currently lacks a
specification for stability. Without a specification for stability, the
quality of fuel in blends greater than B5 could degrade to a point which
could be damaging to engines.
For the 2007 model year they okay up to B20
With the failure rate of the VP44 injection pump, there won't be any
biodiesel in my truck.
This is a good link on the subject:
Yes, Roy, I think you are right. in the link
it says, > The "secret" is specially made injector nozzles, increased
injection pressure and stronger glow-plugs, in addition to fuel pre-heating.
and goes on to suggest three well tested systems from Germany (where
they've been doing this for years)
This site gives good brew-your-own (biodiesel) and grow-your-own (VGO) info.
I had figured that if I were to try, I would go with making my own
ethanol and SVO, and using an older diesel engine -- say, try it in a
homemade generator first
On 6 Mar 2006 19:14:54 -0800, email@example.com wrote:
I forget whether it was Michigan or Minnesota that requires something
like 20% biodiesel sales statewide and had to back down because of
major problems reported by the trucking companies with clogged fuel
ISTR it was in the MSN news feeds a couple of days ago
they had big problems with biodiesel a trucking company used biodiesel they
would fill up down south and go up north to deliver there goods and gell up
as soon as the trucks hit cold weather they would break down the fuel would
cloud up then gell up there was a article about this trucking company and
what happened if i remember right i think they had like 30to40 trucks
break down the trucking company switched back to the regular fuel from
what i have heard in the summer time it is ok to use but not in the winter
Fueling up down south and then going north and complaining about
gelling problems with biodiesel isn't a valid argument against
You could fill up down south with unblended 100% diesel fuel and go up
north and still have the same problem. Been there, done that a time
or two before biodiesel was ever heard of.
I was curious -- using the two tank method and adapted fuel injectors
etc., do you think a workable solution could be to engineer a method of
mix dependent on sensors where the second tank injects the appropriate
amount of methanol or ethanol
Also, I read about having one tank on SVO and the other on biodiesel but
was wondering whether some of the older diesels could handle SVO with
ethanol in the second tank. http://journeytoforever.org/biodiesel_svo.html
I'm not sure where you are getting the idea for ethanol mixed with
diesel fuel. I was under the impression that ethanol was the stuff
that is so big for mixing with gasoline right now?
Usually, with diesel fuel, the stations up north will either mix
appropriate amounts of #1 and #2 diesel to keep it from gelling, but
I've never heard of using ethanol.
Diesel engines can run on ethanol/ mixtures:
Have read that it's been done in Brazil on Mercedes busses 26 yrs ago,
crankcase oil was used for lubrication of the
hi pressure fuel pump.
The technology is there, it's only a matter of will and desire.
Couple of things though:
The Brazilians are doing this for two reasons: Cleaner air and
self-sufficiency. I'm not saying that those are "bad" things, but I'd
like to see a cost comparison.
They have the same problem with the diesel burning ethanol that we
have here with the gas engines burning ethanol - efficiency suffers.
The second article says they had to "provide 50% more alcohol" to the
They also had to add a cetane enhancer to get the ethanol to self
ignite under pressure, which adds yet another step into the
Given those two factors, and that they say the same engines will run
on diesel, diesel and gas, diesel and vegetable oil, diesel and
ethanol (I wonder when somebody will come up with 50 octane turnip
juice?), I'd almost put these engines in a multi-fuels class, rather
than a straight diesel engine.
its best profits since it bought the operation in 1993. Cocamar's production
cost is $1.10 per gallon, and wholesalers are buying the fuel for $2.68 -- up
from $1.44 last year.
Greg, It was an eye opener to me that a diesel could run on ethanol,
the energy situation in the US is complex, but at the end of the day
it's the incumbent technology that has the trump card ie firm control
of the political system. And changes of any magnitude in energy would
require the influence of congress..
Ethanol/biodiesel are considered a disruptive innovation
and currently treated as such.
But given the instability in the energy markets
it seems logical that ethanol, methanol, biodiesel would be integrated
into the picture. The current pump price of $2.55 + for diesel
combined with the onboard computer ability to detect
and use different fuels should make this a reality.
A phased fuel tax to keep the price high, around $5 ish and use
the procedes to develop alt energy sources could have profound
impacts, but I wouldn't hold my breath waiting.
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