His transfer price back then was just 25 million, lower than that of RVP price.

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The gasoline must have the proper octane, and it must have the proper Reid vapor pressure (RVP).

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The RVP is based on a test that measures vapor pressure of the gasoline blend at 100 degrees F.

FORBES: Why Spring Means Higher Gasoline Prices

The RVP is stepped back down to summer levels starting in the spring, and this usually causes prices to increase.

FORBES: Why Spring Means Higher Gasoline Prices

For example, in their assay group, or their testing group, they have an RVP test, which stands for respiratory viral panel.

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The RVP test gives you faster, cheaper and, most importantly, an accurate analysis of what someone has, so it can be treated properly.

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In the summer, when temperatures can exceed 100 degrees F in many locations, it is important that the RVP of gasoline is well below 14.7 psi.

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Butane, which has an RVP of 52 psi, can be blended into gasoline in higher proportions in the winter because the vapor pressure allowance is higher.

FORBES: Why Spring Means Higher Gasoline Prices

The EPA publishes a schedule for the RVP transition.

FORBES: Why Spring Means Higher Gasoline Prices

While the octane specification of a particular grade is constant throughout the year, the RVP specification changes with the seasons. (See Refining 101: Winter Gasoline for a more detailed explanation of gasoline blends).

FORBES: Why Spring Means Higher Gasoline Prices