With early petroleum refining, there were components of the crude that did not like to distill out as gasoline (light aromatic hydrocarbons). Further it was not heavy enough to be diesel or engine oil. Because the processes we use today with catalytic cracking, and extreme refining technology, that intermediate liquid was more or less a byproduct that held much less value. It was full of ash, (and sulfur from many feed stocks) as well as a low octane rating. It was thick enough that it didn"t vaporize/atomize well unless it was heated to 100+ degrees. There was energy in it comparable to gasoline, but it could not stand compression without detonation, and thus required low compression engines. Low compression reduces expansion ratio, and thus efficiency goes down as well. It does burn, it will run a spark ignition engine, it was cheap (probably a dime a gallon at times) It condensed on cylinder walls and worked its way down past the rings leading to the necessity of draining a quart of oil out of the tractor each work day then refilling the pan with fresh engine oil to keep it from being diluted and ruining the bearings. But engine oil was also cheap. It is not Kero. It is much lighter, and dirtier. It is also not produced due to the improvement of refining, and if made would be way pricy and illegal due to pollution. Those tractors smoked as bad as an old diesel. I hope this helps. Jim
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Today's Featured Article - Trenching With a Plow - by Staff. Introduction: This interesting information came from one of the discussion forums here at YT. We thought we should place it up front so it could be read by anyone interested in putting old iron to work. [Editor] I tried something new today, and it worked so well I thought I should post it - in case it might help someone else. I'm running 100 yards of 4" drain pipe from the gutter downspouts of our house to a pond down the hill. This should hel
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