Over the years I have had two coaches with a Racor primary filter, followed by the typical spin on primary and secondary fuel filters. I currently have just the standard spin on primary and secondary filters.
I change them every 5000 miles typically, but have gone longer when travel interfered with my normal service interval. I miss the Racor because its bowl allowed me to monitor the system for water, but except for one instance about 20 years ago I have never seen any evidence of water or contaminents in my fuel. The one time I had an issue I apparently got a tank of dirty fuel in OK, and it showed up as I was crossing NV. I carried spare Racor pleated filters and by changing those filter elements a couple of times prematurely the problem was resolved.
Fuel filters have to be somewhat efficient to trap contaminents, especially on newer engines like the Volvo, but not to the point where they filters inhibit flow. I would stick with the filters specified for your coach, but if i added a filter, such as the Racor I would use it as primary and use a 30 micron element to catch the big stuff.
Jon and Di 2006 Liberty Elegant Lady, 2021
Jeep Grand Cherokee, 1950 Ford
Knoxville, TN
Owner of three Liberty Coaches since 1990
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