I have always thought that the Polyolefin oil, or derived from Natural gas or whatever is what true synthetic oil is. Such as Amsoil and Mobil 1. The castrol synthetic is just regular motor oil and does nothing for you.
BTW: I am not a chemist or a petroleum engineer. But I do have common sense and......With my own experiences have noticed the following:
1. Synthetic oil in motor and trans of old F-150 300CI 6 cylinder. easy starts in 0F weather and the manual trans shifted easier with synthetic in it.
2. Old boss swears by and sells Amsoil, he drove like a 8ick with his 1987 ranger truck. 220,000 miles on it when he got laid off in 2001, so I dont know how much more longer it went.
3. The pour point of synthetic is much lower, like -50f. I have seen with my own eyes dexron 2 transfluid in a gel state at -40f. (I am merely stating a fact) Not which synthetic is better.
4. I dont know how much hotter synthetic will get, I dont want to start a fire with a hot plate.
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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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