Fisherman 18

Hi guys...just found this site and have learned a lot from reading the posts. When I was boat shopping five years ago I was looking for a V-20 but never found anything decent in my price range, but did find a nice '83 Fisherman 18 that I bought. I have two questions that maybe somebody can help me with. When I first got the boat it had nasty stale gas in the tank and I'm pretty sure I siphoned most of it out. When I refilled it took about 30 gallons. Does anyone know exact capacity? The gauge is highly innacurate and I always top off the tank after each use, but if I knew exact capacity I can get a good handle on how much range I have. My other question concerns gelcoat color. My hull is a sort of off white, and the listing on Minicraft's website doesn't go back as far as 1983. Does anyone know if the newer boats had the same gelcoat colors as mine and what the name of that color is? Great site....keep up the good work