Free Car Diagnostic Frequently Ask Questions

Q. Why it is necessary to change oil?
A. Oil performance is degrades and is oxidized by heat. The oil does not circulate normally because of the impurities that accumulates in the oil. Oil contains a lot of soot specially the oil for the diesel engine.

Q. Does overfilling cause malfunctions on the engine?
A. When you overfilled the engine with oil it will stirred on the oil pan and may creates bubbles which can cause malfunctions such as spill over of bubbles from the oil level gauge, Engine will seized up because the oil pump will not suck enough oil, the oxidation of the oil will be accelerated, and the oil will burn and generates white smoke.