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  #1  
Old 06-27-2013, 07:54 AM
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Running on hydraulic oil

on om602.961 (W124) from 1988.

What do you think is it posible on turbo charged engine?
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  #2  
Old 06-27-2013, 09:16 AM
t walgamuth's Avatar
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I think about any kind of clean oil can be burnt without risk but I'd mix it with diesel at some ratio depending on how viscous the oil is.
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  #3  
Old 06-27-2013, 04:51 PM
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You can cut it with gasoline for a higher concentration of hydraulic oil. Make sure the oil is new or filtered well. My 300SD will run on 80% WMO and 20 gasoline pretty well. If you get prechamber coking, advance your timing a few degrees.
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  #4  
Old 06-27-2013, 08:30 PM
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Quote:
Originally Posted by eatont9999 View Post
You can cut it with gasoline for a higher concentration of hydraulic oil. Make sure the oil is new or filtered well. My 300SD will run on 80% WMO and 20 gasoline pretty well. If you get prechamber coking, advance your timing a few degrees.
How does cutting hydraulic oil with gasoline increase the concentration of hydraulic oil?
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  #5  
Old 06-27-2013, 09:08 PM
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The Engine will run on the Oil.

However, what is in the Oil that will not burn? (Rust inhibitors, detergent and what ash content does it have?)

Where is the stuff that does not burn going to go?

Will some of the unburned stuff stay in the Engine?
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  #6  
Old 06-27-2013, 09:21 PM
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Originally Posted by sloride View Post
How does cutting hydraulic oil with gasoline increase the concentration of hydraulic oil?
Adding 15-20% gasoline helps thin out the oil so that it is closer to the viscosity the injection pump and injectors were designed to run on AKA Diesel fuel. You can do 50/50 with Diesel but you get a similar viscosity with 15-20% gasoline. That means you can run more oil at the same viscosity.

Anything that does not burn exits with the exhaust gas. Some residual MAY and I say MAY be transferred to the crankcase oil. It is not something I worry about because I change my oil regularly.
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1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
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  #7  
Old 06-28-2013, 12:18 AM
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Originally Posted by eatont9999 View Post
Adding 15-20% gasoline helps thin out the oil so that it is closer to the viscosity the injection pump and injectors were designed to run on AKA Diesel fuel. You can do 50/50 with Diesel but you get a similar viscosity with 15-20% gasoline. That means you can run more oil at the same viscosity.

Anything that does not burn exits with the exhaust gas. Some residual MAY and I say MAY be transferred to the crankcase oil. It is not something I worry about because I change my oil regularly.
The above stuff seems very optimistic.

Even if the Gasoline + Oil mixed and you had a Viscosity Meter to check that; having the same viscosity does not mean it has the same lubrication or burning Characteristics.

If someone wants to do that sort of mixing they should find one of the internet sites where the list those sort mixes for the Multifuel Engines that the Military used to use.
Even though the Military shows those uses they are considered as something for use when nothing else is available.
Also note that the Multifuel Engines have a device on the Fuel Injectin Pump called a Fuel Density Compensator on them that tries to adjust the Fuel amount for differences in viscosity.

It is also clear that if Diesel Fuel is not burning well in the Engine that it can cause sticking Piston Rings. So it does not seem a foolish thought to think that something that is not supposed to burn in a Diesel Engine might also cause sticking Rings because it is not going to burn like Diesel Fuel will.

But, I hope the OP has a lot of the Hydraulic Oil to burn as I am curious to see what happens on the long run.
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  #8  
Old 06-28-2013, 02:30 AM
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And here I was thinking that I'm pushing the envelope with my oz/gal of tcw3.
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  #9  
Old 06-28-2013, 10:21 AM
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Originally Posted by tjts1 View Post
And here I was thinking that I'm pushing the envelope with my oz/gal of tcw3.
Go for it; Dude!
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  #10  
Old 06-28-2013, 10:29 AM
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on the subject, im quickly getting sick of the wvo headache, having to round up enough small amounts to make it worthwhile, and, after even more reading on the subject, figure on going back in the direction of waste petroleum oils mixed with rug.....worked great before, and now i have a big 30-plate Flat Plate Heat Exchanger, so that should help combustion further......
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  #11  
Old 06-28-2013, 12:43 PM
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Wouldn't Kerosene be a better choice than gas?
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  #12  
Old 06-28-2013, 12:59 PM
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Quote:
Originally Posted by 300D-91 View Post
Wouldn't Kerosene be a better choice than gas?
I believe Kerosene has a similar viscosity to pump Diesel, and therefore would not do the same job that RUG will do. I have not ran WMO in any of my vehicles before, but clean hydraulic oil could be considered similar to WVO as far as viscosity is concerned. My bro and I have been blending WVO with RUG for years (many hundreds of thousands of miles), and would not hesitate to use hydraulic oil in the same way if a good source became available.
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  #13  
Old 06-28-2013, 01:12 PM
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Quote:
Originally Posted by ROLLGUY View Post
I believe Kerosene has a similar viscosity to pump Diesel, and therefore would not do the same job that RUG will do. I have not ran WMO in any of my vehicles before, but clean hydraulic oil could be considered similar to WVO as far as viscosity is concerned. My bro and I have been blending WVO with RUG for years (many hundreds of thousands of miles), and would not hesitate to use hydraulic oil in the same way if a good source became available.

The owners manual for my 91 300D states that in low temperatures kerosene may be added to the fuel. In fact many truckers did this years ago in the winter. But the thing that sands out to me is the block marked "Warning!

Under no circumstances should gasoline be mixed with diesel fuel.
"

Of course I've never run any form of oil in my cars for fuel, so all this may be irrelevant
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  #14  
Old 06-28-2013, 01:20 PM
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Quote:
Originally Posted by 300D-91 View Post
"Warning! Under no circumstances should gasoline be mixed with diesel fuel."
Cutting diesel with gasoline is completely different from cutting Oil/WMO/WVO with gasoline.

The lubricity of diesel is not very good to start with, cutting it with gas will further reduce it. On the other hand, Oil/WMO/WVO has too much lubricity so to speak. So cutting it with 20% gas will make it closer to diesel with respect to viscosity and lubricity. Obviously, the 20% is not a hard number but is close enough.
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  #15  
Old 06-28-2013, 01:26 PM
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Quote:
Originally Posted by 300D-91 View Post
"Warning!

Under no circumstances should gasoline be mixed with diesel fuel.
"
I never said anything about mixing gasoline with diesel fuel. I am talking about WVO (or WMO, WHO, ATF etc) blended with RUG (Regular Unleaded Gasoline). However, I have heard that early MB owners manuals stated that a small amount of gasoline (1% per degree below freezing?) could be added. This has all been debated before on other threads, so no need to "fuel" (pun intended) the debate here.
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