SVO, or straight vegetable oil, is different from biodiesel. SVO has no "refinement" done to it, and no special equipment to handle it. All you need is a small hand pump to suck it out of the waste oil barrels at the restaurants, and 5 gallon containers to transport it in.
The vehicle is modified to include a heated (using engine coolant) tank to keep the oil at the right viscosity, and a way to switch from straight diesel to SVO. You can't leave the SVO in the lines or the injector pump, because it will gel up and make a mess!
Sooo, even though a 650 is gas-start, you will still need to have a way to switch to regular diesel at shutdown time before you switch to gas.
Biodiesel is treated chemically with lye and methanol to remove the glycerin, and can be dumped straight into the regular diesel tank.
Either fuel is BETTER for any diesel engine than dino diesel. Both have more lubricity, (they're "more slippery") which reduces wear and tear, makes the engine run smoother, etc..
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
... [Read Article]
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