I might add , jd , the proper wording is "synthetic lubricant" for the non crude based and "synthetic oil" for the crude based. This is one way they get around it in marketing. The aerospace industry has had synthetic "lubricants" for a long time. Too expensive to consider for use in autos. Anything called synthetic oil is probably just that...oil! Granted , it will have a superior additive package and superior refining techniques which will make it a superior "oil" but it is still oil.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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