A troy pound is equal to 12 troy ounces and to 5,760 grains, that is exactly 373.241 7216 grams. Troy weights were used in England by jewellers. Apothecaries also used the troy pound and ounce, but added the drachms and scruples unit in the Apothecaries' system of weights.
Depends on the API gravity of the gasoline, which varies by grade and refinery. Usually, regular unleaded gasoline has a gravity of around 58 and a weight per gallon of 6.216 pounds per gallon. Premium gasoline may have a gravity of 54, or 6.350 pounds per gallon.
JP-4, the most commonly used Jet Fuel, weights 6.84 pounds per (US) gallon ... Jet A and Jet A1 are the most commonly used Jet fuels; their weight is 6.8 pounds per (US) gallon. JP-4 is a mixture of wide cut gasoline, kerosene, and oil, it has no anti-ice additives; its weight is 6.4 pounds per (US) gallon. The smell between the two is entirely different.