Well i don't do anything else to the gas but I only put in 93 octane. I am a boat mechanic (MK rating) for the US Coastguard, so I try and take pretty good care of mine as well. I know that it cost to have everything done, but it cost more to have it fixed and it takes time AWAY FROM FISHING....
I have seen a lot of engines that people take care of and engine that people don't... Pole Bender- You one of the smart ones...
Have a good season