Posted by 2x4 on July 12, 2011 at 14:23:27 from (75.106.104.220):
In Reply to: Really dirty engine posted by Ultradog MN on July 12, 2011 at 11:16:33:
Maybe they used cans of very old oil. Motor oils were once made by 2 processes; cold or hot. Big refineries used the best method: hot. Small refineries like Quaker State & Pennzoil used the cheaper cold process, which left a lot of thick waxy gunk in an engine. Mechanics could look in an engine & tell which type of oil the car owner was using. Refineries quit using the cold process by the early "70's.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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