The reason why the dots aren't accurate is due to the shape of the fuel tank. When it's full, the top two dots have more fuel because it's over the hump made to clear the drive shaft. As the fuel drops, it's not measuring nearly as much fuel, so it reads a lot less fuel per dot.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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