Abstract: A fluid treatment apparatus for an internal combustion engine of a vehicle includes a fluid supply line leading from a fluid supply tank of an associated engine and a fluid pretreatment device communicating with the fluid supply line. The fluid pretreatment device includes a housing, a conical structure extending in the housing, a collection cup supported on the housing, and a draw tube. The housing includes a wall, and the wall cooperates with the conical structure to define a particle separation chamber in the housing for separating particles from a fluid flowing through the separation chamber to produce a pre-cleaned fluid. The collection cup receives and holds the particulate matter separated from the fluid in the particle separation chamber. The draw tube extends into the particle separation chamber for leading the pre-cleaned fluid back to the fluid supply line.