There are literally hundreds of air/oil sparators made, a quick Google search shows that, however, 95% of them are "vented air devices" made for keeping the oil out of atmospheric or engine PCV systems. Wet sump engines need to be vented, and these devices are fine, if not a good idea.

However, the SPINTRIC® is NOT in this category. The SPINTRIC® is designed to help eliminate the air from the scavenge return to the oil tank. The nature of the drysump system is to "over scavenge" the engine, sending oil and air back to the oil tank or reservoir. The SPINTRIC's® job is to send de-aerated oil back to be used again, sometimes within seconds! The air then is sent back to the top of the tank where it can be vented back to the atmosphere. This is important to understand, as both devices separate air from oil, but in totally different dynamics, function, and end results!

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