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.
Gallons measure volume and grams measure mass (weight, in common parlance) so they're not interchangeable. It's a bit like asking what your height is in pounds. Water (the usual standard) weighs 1 kilogram per liter so a gallon, which is about 3.78 liters, would weigh 3780 gm. However a gallon of cooking oil would weigh less because it's less dense, while a gallon of mercury would weigh a heck of a lot more. 10 people found this useful.