My 235 was overhauled in 2006 and I have run without a filter ever since. I change the oil every 3000 miles. I did put an aftermarket remote filter but could not get a pressure reading so I took it off and run without ever since.
Ron, The Computer Greek I love therefore I am. 1954 3100 Chevy truck In the Gallery 2017 Buick Encore See more pix 1960 MGA Roadster Sold 7/18/2017