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 - A Belt Pulley? Really Doing Something? - by Chris Pratt. Belt Pulleys! Most of us conjure up a picture of a massive thresher with a wide belt lazily arching to a tractor 35 feet away throwing a cloud of dust, straw and grain, and while nostalgic, not too practical a method of using our tractors. While this may have been the bread and butter of the belt work in the past (since this is what made the money on many farms), the smaller tasks may have been and still can be its real claim to fame. The thresher would bring in the harvest (and income) once a y
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