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Internal Combustion Engine. Most engines in road going vehicles are 4-cycle internal combustion gasoline engines.

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My brother's approx. 2010 Scion's oil seems to get dark rather quickly as well. I've heard that darker oil means that the oil is doing its job and keeping the engine clean by bringing the … contaminants into the oil. Do you think the older Ford has a lot of particles in the engine not getting picked up by the oil, or perhaps do the new Japanese cars produce more contaminants for some reason? I'm …
asked Oct 4 '15 by Eric Martin