One final reason for finding oil in your engine air filter: It's supposed to be there for certain high-performance air filters.

Affordable mass has become the watchword of defense modernization, be it swarms of drones or satellite constellations. What could such an approach mean for air and missile defense? Networks of passive ...

15 Best Engine Air Filters: One thing you need for peak performance is a good air filter that ensures that only clean and filtered air reaches the engine.

The plenum is a box that connects to your heating, ventilating, and air conditioning system, and the intake can be found at the base of your windshield, where your wipers are located.

We feature several quiet portable air conditioners in this guide, but the Friedrich ZoneAire Inverter Portable Air Conditioner (ZHV16DA) does the best job of balancing quiet operation, cooling ...

Get rid of musty AC smells in your car with simple DIY tips—clean vents, replace filters, and disinfect the system.

Blood in the Streets and Death in the Air: Residents Survey Damage in Syrian City In the southern city of Sweida, residents describe the aftermath of a wave of sectarian violence.

One theory: Stiff south winds of 15 to 20 mph in the Omaha area, with gusts up to 30 mph, might be drawing smoke from a prescribed prairie burn-off in east-central Kansas into eastern Nebraska.