oil - oval
- oil
- oil additive
- oil and water extractor
- oil bath air cleaner
- oil bath suspension
- oil binding
- oil bleed line
- oil bleed passage
- oil breather
- oil breather pipe
- oil burner
- oil can
- oil change
- oil circulation
- oil consumption
- oil control
- oil control orifice valve
- oil control ring
- oil cooler
- oil cooler bypass valve
