6368 Posted May 24, 2008 Share Posted May 24, 2008 I have a 96 rd with a fram filter housing and i have noticed that other rd's have a larger donaldson filter housing. is this just a differnce in years or a difference in the size of the engine. which filter has the best capacity ? also that little restriction gauge on the side of the filter housing never moves. i thought it was broken so i took it off and put vacuum to it and it moves:although i'am unsure as to what specific level of vacuum indicates its time to change the filter. i just change the filter every 600 hrs. Is this ok? Quote Link to comment Share on other sites More sharing options...
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