I am sorry but the question is not answerable.
With out knowing what yo8u think "Good on Gas" is and what model Saturn you are looking at I can't tell.
But in general Saturns were average to above average in their class for fuel economy but never the best.
Yes Saturn cars have very good gas mileage. They are compact and well made, they have good engineering work behind them that designed a good car with great gas mileage.
Saturn is a gas.
Saturn is not a gaseous, Saturn is rocky
Saturn is a gas planet or gas 'giant.'
Saturn is a Gas Giant.
Saturn is a gas giant.
Saturn is a gas planet.
saturn is a ball of gas
Saturn is a gaseous planet. The solid planets are Mercury, Venus, Earth, and Mars. The gas planets are Jupiter, Saturn, Uranus, and Neptune. Pluto (which is also solid) is no longer classified as a planet.
Saturn is a gas planet
The most abundant gas in the atmosphere of the planet Saturn is hydrogen.
Saturn is a gas giant, there is no solid surface.