A cold engine is inefficient. Magastos sa gas and produces excessive (although invisible) pollutants.

Sa tanghali lang mainit sa Pilipinas. May gabi at umaga pa din tayo. May Tagaytay, Baguio at Hi Peak din.

Most shade-tree radiator shop people didn't go to automotive tech school. Their only objective is to prevent overheating. They couldn't care less about proper operating temperatures and other engine parameters.