What does oil do in your car?

Article from Castrol Archives.

Oil covers and protects every internal part of your engine.

When engine parts rub against one another, oil is always there between them, reducing friction and preventing damage – even though the pressures and forces are incredibly high. Oil also has special ingredients that suspend tiny particles of combustion soot, preventing the accumulation of dirt and deposits, and fight high temperature oxidation, keeping the oil flowing smoothly.

Manufacturers specify the correct oil for their vehicles – your handbook will tell you the correct specification, which will usually be on the oil bottle’s back label.