just a quick recap...
the 95 gtx is a 657 isn't it ?
to the OP.... this isn't a gas hog, this is a fairly efficient ski.... it only gets worse, your actually in pretty good shape there.
store less crap on the ski, lose weight, ride slower, buy a spare gas tank to keep at the ramp,
or
sell the ski and get a smaller, lighter hull like a sp or spi, or a gts... and you'll see about a 20% improvement
downside to sp and spi, 9 gallon tank,you'll use less per hour, but you'll have 3 gallons less to work with. the GTS will still get you a 12 gallon tank