As long as the height of the filter element is correct, 1/2" of diameter won't make any difference. If the filter element seals properly at the top and bottom, the oil has to pass through the filter media, and a slightly shorter distance between the inner and outer folds of the element material won't affect how well, or how long it filters. Use either one!
Jerry

Last edited by Hotrod Lincoln; 02/13/2009 12:21 AM.
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