Engine oil turns black from a combination of combustion byproducts, heat oxidation, and detergent additives suspending carbon ...

You’ve probably heard of the PCV valve if you drive a gas or petrol-powered car, but you might not realize just how crucial this small component is to your engine’s health. Despite its simple design, ...

When it comes time for your regular tune-up, you may be surprised to find oil on the spark plugs. This contamination often reveals a mechanical problem, but how do you know what’s wrong? In this guide ...

We don't mean to be the harbingers of doom, but it's unwise to keep driving if your car's engine has a malfunctioning positive crankcase ventilation (PCV) system, particularly a bad PCV valve.

Although some maintenance schedules include an interval for replacing the positive crankcase ventilation, or PCV, valve, others may not. In the latter case, a general recommendation is to replace the ...

Emissions controls garner more hate than just about anything else in the automotive world. And this isn’t some fad hatred that will fade away. It was forged long ago in the underwhelming fires of the ...

What is an oil catch can anyway? Oil catch cans keep direct-injection engines from choking on their own blow-by — here's the quick-and-dirty on why you may need one. Think of an oil catch can as a ...

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 ...