2020 Crosstrek Limited
I would believe 7.75 pounds per gallon- but I do not believe 7.75 pounds per quart!The crosstrek takes 4.6 quarts of oil at 7.75 lbs/quart which is 35.6 pounds of motor oil per 3100 pound Crosstrek. It is a 1% savings in weight, thought not of volume. I'm not sure how much savings that will get over having someone at port or the dealer add oil to the engine.
Please check your data.