They are environmentally friendly, and they are cleaned. Gas pumps are efficiently, no matter the engine's function. Gas pumps are therefore great for long-term usage, and for the long-term life of the engine.
These small gas pumps can also be used for oil-based pumping, such as a propane gas pump or a propane gas pump. If one is checking and inexpensive, it is easy to maintain and save a lot of power.