Symbol 1056 from ISO 7000 - Title/Meaning: Oil; fluid Function/description: To identify oil or other non-water base fluid. On an indicator to identify oil or used to identify a fill cap.
Additional information: 
Use primarily as a symbol element in combination with other symbols to indicate specified types of oil. May be used when the type of oil or fluid is not specified.
Own work using: iso.org/obp/graphics/grs/fcb62501-c80e-46e6-917a-88bb6fbacca1 200.png
Vectorization:  Mrmw