Quote:
Originally Posted by 67rstbkt
I go 5 months/5000 miles on mine.
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Have you ever considered giving this a try?
Then match it up with an AMSOIL Ea Filter and you have superior protection and you only need to change your oil 50,000 miles, 600 hours or once a year. I'm not sure if you have the 7.3 or the 6.0 to show you the proper filter. Yearly it could cost less also!