Do you really need an oil separator?

If you have a direct injection engine, you should have an AOS. When you go bigger on horsepower, you should have a quality AOS. Even if your vehicle is otherwise stock, and AOS can greatly improve performance and economy over time. They work well when installed correctly, it’s the right product for your engine.

What do oil separators do?

An oil separator helps by filtering the oil (“catching it”) out of the air before it is routed back to the intake system. A basic PCV system runs a hose from the crankcase or valve cover directly to the intake tract, dumping the crankcase air prior to the throttle body.

Does a oil catch can add horsepower?

An oil catch can doesn’t add any power or make any cool noises so it is often overlooked when modifying vehicles. However, a catch can will ensure you always have a cleaner intake tract free of oil, and help keep your engine running better for longer.

Which is better oil catch can or air oil separator?

They key difference between the two is what they do with the oil that is captured. In the case of a Catch-Can, it will simply hold any oil or liquid captured until it is drained. An Air-Oil Separator on the other hand will have the addition of a drain, which will let the oil captured to drain back into the oil pan.

Does an AOS require a tune?

You do not need a tune for an AOS.

Are air oil separators bad?

The Moroso Air/Oil Separator does more than just catch the oil, it also keeps harmful crankcase vapors and moisture from going back into the intake manifold, which kills engine durability and performance.

How does GrimmSpeed AOS work?

A: The GrimmSpeed™ AOS allows you to separate the vapors from both the heads and the crankcase. Others on the market only allow you to separate the vapors from the head. A: When the oil vapors are mixed into the intake system, it effectively lowers the octane which can cause detonation.