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AC oil filter ID


Eldovert

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DEPENDING ON THE CONNECTIONS FOR IN AND OUT ON THE CANNISTER MAKES A DIFFERENCE OF WHAT YEAR IT IS. IF IT HAS TWO ON TOP IT IS FOR 31 IF IT HAS 1 ON TOP AND 1 ON THE BOTTOM IT IS FOR 29-30. IT SHOULD FIT BUICK CAD OLDS PONTIAC AND MAYBE CHEVY. THEY ARE A ONE TIME FILTER AFTER 10 K MILES THEY WERE A THROW AWAY. THAT MAKES THEM VERY HARD TO FIND. A PLACE IN CAL. IS MAKING ONE WITH A SPIN ON FILTER INSIDE IT SO IT LOOKS ORIGINAL FOR $175

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The original oil filter on my Pontiac is an "XA5" just like the one above. It is interesting that it suggest changing every 10,000 miles. I have several of these filters and found that they were in fact still filtering at 10,000 miles. The system is partial flow and at this mileage the filter was still getting hot when the engine was running. As these are so rare I started using the smaller filter that Plymouth (C1/2 and it's variations) used in the 40's and 50's that still had the same screw on fittings. These filters only filtered for a little over 500 miles. After that point you could run the engine for hours and the filter never got warm. To me this indicated that there was no oil flowing through it. Having discovered this and finding the filters getting scarecer I just stopped replacing them. I guess this is the reason that I am having to rebuild my engine a second time after only 285,000 miles ( I should have been filtering my oil so I would have gotten more miles out of the engine).

I wonder what the difference was in the filter medium. Also I wonder how long the modern look alike would filter???

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