for those of you who think avgas can only be used in planes. then here is a good use for it even though it is a lot more expensive than pump prices. labled as 100ll ie low lead and high octane it also has a no rot property, this means it is quite safe to keep it in your aeroplane tanks for years and it will be safe to use it. it is also really good for your lawn mower just run your last cut of the season with avgas and your carbs will be as good as new at the start of the next season and the small amount of avgas in the tank will keep good. this also means that your outboard can be run through with avgas but i would check woth your manufacturer first. might be ideal for the smaller cheaper motors. as for costs of boating diesel i dread what might happen in the next couple of years i run a commercial operation but the rising cost of fuel still does not make me a happy bunny because it dents my profits big style. i am going to look at the bio fuel options in the future as this might be the only way to control diesel prices.