来自MSN1 小时
Do You Really Have to Change Your Oil Every 3,000 Miles?
To quickly answer the inquiry posed in this article’s title, NO! Modern vehicles do not need to have their crankcase l ...
Cars8 年
PCV Valve
The positive crankcase ventilation valve releases exhaust gas and unburned fuel from the engine block into the intake manifold. All engines allow some exhaust gases, unburned fuel and oil to ...