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During my holiday road trip to W. Virginia I decided to change the oil, what with my ridiculously high mileage of 644 mi. The oil drained down into a 5-gallon bucket from up on the lift and sounded for all the world like... WATER! 5W20, whose idea was this, and WHY? Sewing machine oil is thicker than that stuff! My lead mechanic just shook his head and said it's "junk" and that "it will cause the engine to wear out prematurely." I opted for the "thicker" 5W30, but he still wasn't happy. Does anyone know more about this oil thing? I don't want to thumb my nose at Ford, but I don't like a disgruntled, head-shaking mechanic either. I welcome any info on this.