A scroll compressor comprising: a housing; scroll compressor bodies (110, 112) disposed in the housing, the scroll compressor bodies (110, 112) including a first scroll body (110, 112) and a second scroll body (110, 112), the first and second scroll bodies (110, 112) having respective bases (116, 120) and respective scroll ribs (114, 118) that project from the respective bases (116, 120), wherein the scroll ribs (114, 118) mutually engage, the second scroll body (110, 112) being movable relative to the first scroll body (110, 112) for compressing fluid; a drive unit disposed in the housing, the drive unit providing a rotational output for operatively driving one of the scroll compressor bodies (110, 112) to facilitate relative movement of the scroll compressor bodies (110, 112) for the aforementioned compression of fluid; and an oil return tube for delivering oil from an upper region of the housing to an oil sump in a lower region of the housing, wherein the oil return tube comprises: a tubular portion, wherein the tubular portion is positioned substantially vertically within the housing, the tubular portion being non-circular, characterized in that the tubular portion has a first stepped portion (206, 208) at an upper end of the tubular portion and a second stepped portion (206, 208) at a lower end of the tubular portion and further comprising a non-stepped portion between the first and second stepped portions (206, 208), and that the first stepped portion (206, 208) is radially outward of the non-stepped portion, and the second stepped portion (206, 208) is radially inward of the non-stepped portion. a housing; scroll compressor bodies (110, 112) disposed in the housing, the scroll compressor bodies (110, 112) including a first scroll body (110, 112) and a second scroll body (110, 112), the first and second scroll bodies (110, 112) having respective bases (116, 120) and respective scroll ribs (114, 118) that project from the respective bases (116, 120), wherein the scroll ribs (114, 118) mutually engage, the second scroll body (110, 112) being movable relative to the first scroll body (110, 112) for compressing fluid; a drive unit disposed in the housing, the drive unit providing a rotational output for operatively driving one of the scroll compressor bodies (110, 112) to facilitate relative movement of the scroll compressor bodies (110, 112) for the aforementioned compression of fluid; and an oil return tube for delivering oil from an upper region of the housing to an oil sump in a lower region of the housing, wherein the oil return tube comprises: a tubular portion, wherein the tubular portion is positioned substantially vertically within the housing, the tubular portion being non-circular, characterized in that the tubular portion has a first stepped portion (206, 208) at an upper end of the tubular portion and a second stepped portion (206, 208) at a lower end of the tubular portion and further comprising a non-stepped portion between the first and second stepped portions (206, 208), and that the first stepped portion (206, 208) is radially outward of the non-stepped portion, and the second stepped portion (206, 208) is radially inward of the non-stepped portion.