Engine
What is an Oil Filter?
Keeps your engine oil clean so internal parts don't wear out.
Simplified animation — not to scale.
In plain English
A small canister that filters the oil circulating through your engine, trapping metal shavings, soot, and grit before they can damage moving parts.
A simple analogy
"Like a coffee filter — keeps the grounds out so only the good stuff gets through."
How it works
The oil pump pushes oil through pleated paper inside the filter. Clean oil comes out the other side and lubricates the engine.
Signs of trouble
- ⚠Oil warning light
- ⚠Engine noise (knocking or ticking)
- ⚠Dark, gritty oil on the dipstick
- ⚠Overdue service interval
Rough UK cost
£10 – £25 (always changed with an oil service)
Always get a written quote. Prices vary by car, region, and parts brand.
Heads up: Carautonomy is for general guidance only. If your car is showing warning lights or behaving oddly, get it looked at by a qualified mechanic.