From the late 19th century through the early 20th, blow-by gases were allowed to be exhausted intoor oil to be found both inside and outside an engine, and for oil to drip to the ground in small but constant amounts.
Blow-by gases were allowed to be exhausted intoor oil to be found both inside and outside an engine, and for oil to drip to the ground in small but constant amounts. This was from the late 19th century through the early 20th.