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Oil Catch Can - is it needed?

ShadowsPapa

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Racer, do you drive gently?
I drive my 2020 Rubicon like an old lady which creates a lot of vacuum and my catch can (3 oz? Mishimoto) fills in a few thousand miles. Has since 15k, has 95k on it now.
High vacuum with higher speed flow should allow the separator inside to fling the oil out of the air stream. Besides the valve itself, there's a cyclone type separator in the engine. That's how the catch can works, using the same principal.
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