A concerned reader inquired about what could be under his car's oil filler cap. He found a yellow substance ... This is a ...

Let me explain. The milky residue on an engine cap is the product of engine oil mixing with water or moisture. It’s that simple. But your engine oil cap should create an airtight seal.

Galp Energia makes a significant discovery of oil and gas condensate at its Mopane-3X exploration well offshore Namibia, ...