The crude oil engine is a type of internal combustion engine similar to the hot bulb engine. A crude oil engine could be driven by all sorts of oils such as engine waste oil and vegetable oils. Anything could be used as fuel, even peanut oil and butter if it was necessary. Like hot bulb engines, crude oil engines were mostly used as stationary engines or in boats. They can run for a very long time, for instance at the world fair in Milano in 1907, a FRAM engine was started and it wasn't stopped until the exhibition was over one month later. A crude oil engine is a low RPM engine dimensioned for constant running and can last for a very long time if maintained properly. To meet Wikipedias quality standards, this article may require cleanup. ... The hot bulb engine is a type of internal combustion engine; more specifically, it is a compression ignition engine, in which the fuel is ignited by being suddenly exposed to the high temperature and pressure of a compressed gas, rather than by a separate source of ignition, such as a... Worlds Fair is the generic name for various large expositions held since the mid 19th century. ... This is about the Italian city of Milan. ... 1907 (MCMVII) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Wednesday of the 13-day-slower Julian calendar). ... Fram in Antarctica in Roald Amundsens expedition. ...

It was later replaced by the diesel engine. now. ...