Knowledge Base TTS 
Engine
2 min
Why change oil every 7-10 thousand km?
The myth of 15-30 thousand kilometers: why manufacturers recommend it and why it kills your engine.
The Truth About Oil Change Intervals
Many car manufacturers recommend changing engine oil every 15–30 thousand kilometers. But why do experienced mechanics advise doing it much more often?
What Happens to Oil During Engine Operation
Oxidation and Aging
Engine oil begins to degrade from the very first day of use. High engine temperatures (up to 300°C near piston rings) accelerate oxidation.
Contamination Build-Up
- Fuel combustion byproducts
- Metal particles from component wear
- Moisture from condensation
- Soot and carbon deposits
Real-World Driving Conditions
- Frequent short trips (engine does not reach operating temperature)
- City traffic (idling in traffic jams)
- Variable fuel quality
- Dust and sand on roads
- Sudden temperature changes
Why Is It Important?
What Happens to Engine Components Without Timely Oil Changes:
| Component | Consequences |
|---|---|
| Piston rings | Carbon buildup → compression loss → increased oil consumption |
| Crankshaft bearings | Abrasive wear → engine knocking → major overhaul |
| Camshaft | Scoring on lobes → unstable valve operation |
| Turbocharger | Blocked oil passages → bearing overheating → turbo seizure |
| Hydraulic lifters | Deposits → valve ticking → incorrect clearances |
Repair Costs If Ignored
- Piston ring replacement: 6000–10000 PLN
- Bearing replacement: 2000–5000 PLN
- Engine overhaul: 10000–20000 PLN
- Turbo replacement: 800–2000 PLN
Compare: an oil change costs 350–500 PLN. Saving on oil = repair costs 20–50 times higher.
Twin Torque Service Recommendation
Optimal interval: every 7–10k km or once per year
“An oil change is the cheapest insurance against expensive engine repairs.”
Tips
- Use oil with the recommended viscosity
- Replace the oil filter at every oil change
- Check oil level weekly
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