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Cattle Boards
Trucks, Tractors & Machinery
Motor oil: diesel vs gas trucks
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<blockquote data-quote="flaboy?" data-source="post: 350501" data-attributes="member: 5749"><p>Now this might start some "stuff" but.........usually broken valve springs and/or valve stems are not due to lack of lubrication. Valve springs fail mainly from fatigue, and push rods break for the same reason. Neither are oiled like a bearing. With that said, oil is also used as a coolant for these metal parts. A guy I went to school with used to work on some NASCAR teams. At one time as the head mechanic on one. We had this discussion and he told me they have never been able to relate a broken valve or valve spring to oil as a cause.</p><p></p><p>Now, could it be that the oil he used in his diesel truck did not meet the API requirements for the gas motor? If it did then my bet would be the "heavy oil" did NOT cause this problem.</p></blockquote><p></p>
[QUOTE="flaboy?, post: 350501, member: 5749"] Now this might start some "stuff" but.........usually broken valve springs and/or valve stems are not due to lack of lubrication. Valve springs fail mainly from fatigue, and push rods break for the same reason. Neither are oiled like a bearing. With that said, oil is also used as a coolant for these metal parts. A guy I went to school with used to work on some NASCAR teams. At one time as the head mechanic on one. We had this discussion and he told me they have never been able to relate a broken valve or valve spring to oil as a cause. Now, could it be that the oil he used in his diesel truck did not meet the API requirements for the gas motor? If it did then my bet would be the "heavy oil" did NOT cause this problem. [/QUOTE]
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Motor oil: diesel vs gas trucks
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