The Gas Gauge's are accurate on all year Fbody's. Its the gas tank on the 98's and lower years that is the problem. They have a V type shape or something like that and is why it made the gauge read the way it does. After a 1/4 tank or so the gauge would drop fast. That is because of the shape of the gas tank.

Jason

 

Gas tanks are not a perfect shape. The top half will hold more than the bottom half. I cannot think of ANY car that is not like this. The first half of your gas gauge will go by slow, then it will drop faster and faster below 1/2.

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1983 Monte Carlo, 307 Stroker, TH350, 3.73 10-Bolt - SOLD 8/19/02

Future F-Body Owner