The threads are slightly different, thats why they are different part numbers.
Stay away from everything Fram in general, I prefer Amsoil EaO filters, Bosch filters, and K&N filters. Those are the order I use them in, Amsoil's by far the hardest to get but I like the Bosch design and its half the price of the K&N.
Why is the Fram 9837 filter for my 05 about an inch shorter than the factory ac delco filter? Diameter is the same but ac delco filter is about an inch longer than the fram one, does this mean the ac delco holds more oiil?
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