An engine air filter is made to keep the dust, particles, and contaminants out of the engine as it runs. An overly dirty, clogged or incorrectly installed filter is not healthy for your motor and can lead to major issues. Typically, air filters are easy to replace; however, replacements in newer cars become more complicated due to the fuel economy and aerodynamics. These complications multiply with exotic and luxury vehicles, and escalate drastically when creating higher performance in the engine. Here are the top three signs that you should change your engine air filter: Physical Dirt and Dust If you run your fingers across the filter and your hands are dirty or dingy, that should be more than enough to tell you that you need a new one. The more dust collected on the filter, the less air can pass through to the engine. A clean air filter should be a white or off-white color, so as it catches dirt and dust over time, it will get darker. If it looks da ... read more