Multi-fuel engines - diesel-gas-jet fuel- used engine oil
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Thread: Multi-fuel engines - diesel-gas-jet fuel- used engine oil

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    Brian's Avatar
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    Multi-fuel engines - diesel-gas-jet fuel- used engine oil

    I was waiting for my son to wake up to go play today and I had some doomsday show on and they had this family that had a duece and a half as thier mode of transportation when all hell breaks loose. He had gathered over 1500 gallons of used motor oil so they could travel over half of the US.

    This got me thinking a bit on a nice multifuel generator, or a vehicle that could run on used motor oil.

    But with that said, I knwo very little about these engines as they have to have high compression but also have spark plugs for gas. Anyone here work on these, own one or know how they work?



    Brian

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    56FordGuy's Avatar
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    I've worked on a couple, but not very in depth. No spark plugs, they run like any other diesel engine. The injectors shoot a stream of fuel into the cylinder instead of a mist. The fuel collects on top of the piston, then compression ignites it. The delayed ignition is what allows gasoline to be run. Beyond that, I couldn't tell you much. They were in the M35s and a couple of 5 tons, and are way underpowered when compared to Cummins engines in the same trucks.
    -Blake

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    DRobinson's Avatar
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    Running on low octane MOGAS, they smoked enough to keep the undesirables away from the right side of the truck.
    Don

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    They look like a conventional diesel engine with no plugs just like 56 said. They have lower compression and very underpowered for their size. They are also not very efficient. But they can burn darn near anything you can pour down their throat. We used to buy them for $500 all day long, brand new in the shipping can at the DRMO in AK before they closed it down. A good filtration system is mandatory with these fuel systems. The injection system wasn't as high pressure and a bit more forgiving on tolerances.
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    I often thought about picking one up just for the heck of it. So are you saying that even though they'll burn almost anything, you need a lot of "anything" to go very far? If you were running it on a mix of 50/50 used motor oil and diesel would a deuce get 3 mpg and on straight diesel get 6 mpg, or do the multifuel engines get terrible fuel economy no matter what?
    Andy B.

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    Brian's Avatar
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    For some reason, running around on used motor oil sounds too cool.

    restored deuce 1/2 6x6

    What would I use it for? I have no clue.......



    Brian

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Quote Originally Posted by andy b. View Post
    I often thought about picking one up just for the heck of it. So are you saying that even though they'll burn almost anything, you need a lot of "anything" to go very far? If you were running it on a mix of 50/50 used motor oil and diesel would a deuce get 3 mpg and on straight diesel get 6 mpg, or do the multifuel engines get terrible fuel economy no matter what?
    Yup. The military wasn't concerned with fuel economy or range. Couldn't tell you what range and mileage could be. All I ever did was fill them up with JP8 or JP5. This motor is a compromise in many ways. Still cool though...

    Brian, they are fun to drive for a while. Then the lack of power, no power steering, the non-synchronous transmission means double clutching, and top speed of about 45-50ish gets old.
    - Jason

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    2720 w/ 200CX FEL
    , Ken's weld-on hooks, Fit Rite Hydraulics Top and Tilt kit, Artillian forks.
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    110 round fender in the shop for crustoration
    Ferris IS3200Zzero turn mower

    Quote Originally Posted by Gizmo2 View Post
    Dieselshadow is my Hero.


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    Brian, et al.

    Check out this site to learn everything you ever want to about military vehicles. Spent a lot of time over there when I was thinking about getting a Unimog.

    Steel Soldiers

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    Quote Originally Posted by dellwas View Post
    Brian, et al.

    Check out this site to learn everything you ever want to about military vehicles. Spent a lot of time over there when I was thinking about getting a Unimog.

    Steel Soldiers
    Excellent recommendation. Those guys know their stuff.

    Once we get settled, I've got my eye on a couple of 'new' green toys.
    -Blake

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