heavy oil
(F)For purposes of this paragraph, the term “heavy oil” means domestic crude oil produced from any property if such crude oil had a weighted average gravity of 20 degrees API or less (corrected to 60 degrees Fahrenheit). (G)For purposes of this subsection— (i)the taxpayer’s average daily marginal production of domestic crude oil or natural gas for any taxable year shall be determined by dividing the taxpayer’s aggregate marginal production of domestic crude oil or natural gas, as the case may be, during the taxable year by the number of days in such taxable year, and (ii)in the case of a taxpayer holding a partial interest in the production from any property (including any interest held in any partnership), such taxpayer’s production shall be considered to be that amount of such production determined by multiplying the total production of such property by the taxpayer’s percentage participation in the revenues from such property.