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Well the cartidge seems to be leaking there's oil all throughout the intake so I'm guessing it's getting to the hot side too and it leaks from the ypipe onto the dp causing smoke
I've been using Z-Whizz (off of Aero Dr. and Ruffin) for my RX-7 and other cars since 1984. I've been very happy with them, and they know rotaries. They're honest, too!