The answer came about while calibrating blend dispensers. A three product blend dispenser only has 2 meters. The production of the mid-grade gasoline (89 octane) is made from a mixing process from both the regular meter @ 66% and the premium @34%. Calibration on a blend dispenser is performed on regular and premium only. After calibration, a test is done on the midgrade fuel. When there is a bad meter, the readings on this mid-grade gas would spike to +3 to +50 cubic inches per 5 gallons. That’s a loss of 1 to 16 cents per gallon. The reason for this is that the submersible pump in each of the 3 tanks in the ground pushes fuel at 27 lbs of pressure into each meter. This blending procedure by design creates pressure against the meters. Normally pressure is no problem. But when there is damage to the meters such as groves and worn out components, the pressure will push extra product pass the measuring of the meter and go undetected. So now a calibration on each meter must include and additional meter test on all meters at slow speed. If the meter is worn out or bad, only a very slow speed will reveal an overage up to +50 cubic inches or 0.16 cents per gallon.
Remember, allowing just 1 cubic inch for every 5 gallons would cost $680.00 a month or $4,080.00 in 6 months.
Every cubic inch counts.
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