No matter how tightly within the prescribed specifications an engine's piston clearance and ring tension are in its cylinders, a certain amount of fuel and combustion vapor slips past and enters the ...

Regardless of what type of vehicle you drive, if it was built in the last few decades, its engine has some form of emissions control system designed to reduce the harmful environmental impacts of ...

Every engine, regardless of its condition, has a certain amount of blow-by or air/fuel mixture that slips past the pistons and rings and finds its way into the crankcase. In addition, during normal ...