Aloha. I live in Hawaii and am trying to make the best of the crappy gas down here. No matter where i've gotten gas here, it always seems to be crappy, and I always use premium. I've been recommended by a few folks to get a fuel additive at least every other if not every time I fill up due to humidity. I've been told that water residue can build up in the engine from the intake of humid air and cause problems from moisture build up. Is this true? I plan on changing my oil twice a year and only will drive an estimated 2,000 miles a year. Another problem I have is being in stop and go traffic every time I drive. Does anyone have a recommendation?