I just put a WALKER air filter on the PATRON and so far on the 1st trip it DOES seem be an improvement. The ex. smoke was reduced, better thdl. response and MUCH better fuel eco. .... maybe .25 per mpg. It was very nice seas this weekend and no bait tank except on the way home. I have had these cond. before and think it helped. (just the boat tuneing me. I put a K&N filter on my P/U (F-350 7.3) long ago and it DID make a .5 mpg differance on it. This is the same type filter as the K&N .With a cleaning kit around $100.
Just my 3cents.

"I WAS A HILLBILLY... NOW I HAVE A BLACKMAN.....NOW I AM A HILLWILLAM"
Jeff