used hydralic fluid as additive

[Rabbit66]

hey guys, i am a newby to the whole diesel scene. but have been makin my own biodiesel and running in my truck for over a year now. i just got to reading how your adding 2 cycle oil and it's working. could used hydralic oil be used in the same manner. i've got a great supply of the stuff and just wanted to know if anyone had info on it. hate to try something without knowing ahead of time. any input or help would be greatly appreciated...thanks

[DBLR]

My self I would not use it being its made not to burn. Also fill in your sig file so everyone knows what year truck you have and also list any mods you have done to it.

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2006 Ram 2500 Big Horn Edition Auto 5.9L Mineral Gray Met. Quad Cab SB 4X4 SRW 3.73's

[totalloser]

I have wondered this many times myself. I mean when you drop it, it is SOOO clean looking! I would guess it is full of metal, but magnets take care of that.

My suspicion would be that if it were a problem it would lay in coking injectors, but I haven't heard of anyone trying it. My guess is that the 12 valve would be more tolerant as it uses larger orifice two port tips instead of the 6 or 7 port smaller orifices.

Many ag tractors use fluid clutches, and there's also the pressure release fluid brakes in some wheel motors, so it must be high temp resistant, and have friction modifiers. Coked injectors likely. Similar problems to pouring atf in your tank (baaad idea).

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01 24v 100hp tips, 4"ss BDbrake PSCpump 1.5"dom steering tapped box 1.5"ram manual CAD switch dual carters 3.55's LSD, big shaft nv5600/241HD 6 35's inners pulled in (no spacer) Ugly black and thrashed!

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Last edited by totalloser : 06-27-2008 at 09:55 PM. Reason: I goofed. I think it's a bad idea.

[1000EE-Monarch]

I have significat experiance running used hydraulic oil and other junk in 12-valve motors.

I ran used, clean, AW-32, aka DTE light, mixed roughly 50/50 in a '98 12v with a P7100 pump. After running hundreds of gallons of oil, I had a clogged fuel filter. Also noticed slight improvements in power and MPG. I attributed that to the higher BTU content per gallon. I also ran "flame-retardant insulating (transformer) oil", about 50 gallons, same ratio to diesel, ran smokey but OK. Also did some "turbine oil", AW-12 "spindle oil", and of course all the black 15W-40 motor oil that ever came out of the engine.

In a '92 12v with a VE-44 pump I ran hundreds of gallons of mixed used hydraulic oil, mixed at random with whatever diesel was in the tank. On one occasion I took on 30 gallons of hydraulic oil, atf, and other junk (looked ugly), mixed with the 5 gallons of diesel that was in the tank. Truck ran fine warm, idled slow cold and smoked, and after running it for 400 or so miles started missing at idle and smoking grey and white. I suspected injector problems. Just on a whim, I poured half a gallon of water (slowly!) into the intake of the turbo while holding the engine at 2000RPM. About 10 seconds after starting to pour the water, a huge cloud of dark brown-grey smoke emerged from the tailpipe. Truck has ran great since. I attributed the problem to carbon buildup on the injector tips interfereing with the spray pattern. The water blew the carbon out.

All this is rather extreme, but demonstrates that burning junk oil in a 12v can be done without much harm.

OTOH I don't do that to my 24 valve.

I anyone wants to try this, stick to:

small amounts of oil to large amounts of diesel
oil from a known and clean source
low-viscosity oil
oil without additives, friction modifiers, etc.
oil that has no "floaters", "glitter", or sedimet
oil that is not synthetic and/or flame-retardant
mineral oil from transformers is good
used motor oil is pretty good
drive around with a spare fuel filter or two
do not try this in cold weather
nothing gooey or sticky (dohnut frying oil, linseed oil)

Be careful, things can get ugly fast!

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Alex K.
'01 3500 QC 4x4 NV5600 HO 245HP-stock for now. BHAF, no silencer ring.
WANTED: '98 12v 3500 QC 4x4 5spd 3.55 gears

[Walter Buller]

Used filtered ATF works great in my 93 12v.