Just asked because the current PF 8 is an 8A which means at some point an 8 had some changes and was upgraded to 8A. Rest of the curiousity is whether Honeywell did it or was done before their acquisition. I do know that Fram now uses a glass fiber impregnated paper which, I learned from another site is there to improve the consistency of cellulose. That may be the difference.
I've been an oil and tire nut all my life; just interesting following along with technology. Probably because my first vehicle was a '47 Chevy truck that I bought with money earned as a deck hand on a tug boat that summer, that had bald tires and heavy duty oil with something added (sawdust was the common slang) to help it not burn oil till it got off the lot. Changed the oil as soon as I got it home as it was diesel black and the cloud of blue smoke it produced afterwards would gag a maggot. Never forgot either.
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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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