oil separator benefits
performance improvement would be dependent upon your engine. A really hi-performance, high compression engine will benefit more, as the oil that is getting put back into the combustion chamber with the fuel is reducing the octane power of the fuel. Separating the oil out from the fuel gives you cleaner fuel, which will burn better. Even in a stock LS motor, there will be benefit, but it may be small, as in just a few horsepower, or a tenth or two of one MPG. Your engine will breathe cleaner, regardless, and ultimately run a bit better. if your engine tends to "ping" or detonate only on rare occasions, the separator might fix that, as the oil in the fuel is reducing the effective octane rating, which can cause detonation. Now, my only question is about that core inside my PCV hose. Earlier models of the 5.3 have a PCV hose that is rubber on the outside, but some kind of hard core inside. I have not removed mine to see what it is. does anyone know if that is just another rubber hose? I don't want to cut mine if it is a metal core.