In both childhood and adult pneumonitis, hydrocarbon aspiration occurs at the time of initial ingestion event or subsequently with vomiting.
Low viscosity of an ingested hydrocarbon is considered a major factor promoting aspiration (presumably for mechanical reasons).
[1] "Fire-eater's lung" is an important variant of hydrocarbon pneumonitis, which typically involves adolescents or young adults who are exposed through mishap during flame-blowing performances using a variety of different flammable materials.
[1] Oral ingestion of hydrocarbons often is associated with symptoms of mucous membrane irritation, vomiting, and central nervous system depression.
A history of coughing or choking in association with vomiting strongly suggests aspiration and hydrocarbon pneumonia.