petroleum liquid crude gasoline anoint fuel lipid gas lubricate kerosene grease olive water lubrication carbon food anele lubricant petrol tanker diesel pipeline energy biodiesel condensate naphtha oilman coal commodities sunflower mineral refineries offshore pipelines opec ethane petrochemicals polarity viscosity plant slip oiler volatility oleo marge c margarine bless canola cover cooking oily latin maize metabolic resid lemongrass oleomargarine lipoid lawnmower peanut steroid protein antifreeze paraffin supply wax grain exports alkaloid supplies solubility octane prices exporting bulk reserves butane export gulf barrels demand greasy refining propane hydrogen natural imports wheat tons refuel electricity oxygen adsorption gaseous ore mining fresh sugar tonnes