How much does one quart of oil weigh?

Answer 1

If you are concerned about motor oil the density is about 888.1 g/l at 20C (room temperature). It is heavier at 0 C and lighter at 40 C but not by much. A quart is essentially the same as a litre. 888 g weighs a bit less than 2 lb.

Answer 2

Oil is not a uniform substance but a mixture of different hydrocarbons. Their relative proportion differs from source to source and, as a result, the density of oil varies by almost a quarter. It is therefore not possible to give a sensible answer.

Answer 3

As well as hydrocarbon oils, there are also plant oils, so the variation in densities is enormous.