Changing the oil in your engine is the single most important maintenance for your vehicle. Special chemicals in the oil break down over time because it is exposed to high temperatures in your engine. We do repair Muffler or exhausted cars.
This causes the oil to lose its viscosity and will actually increase friction in the engine’s moving parts resulting in damaging your engine. Most manufacturers recommend that you should change your engine oil every 5000km or every 3 months, which ever comes first.