hmm - I used Royal Purple SynFilm Recip. 100 when I was using a Yong Heng for a couple of years and it never smoked. I did switch to Seco 500 for the new Tuxing I recently bought.The Royal Purple smokes, literally. I'm going to spend the bucks on the Seco. I've got a full unopened RP and a partial if someone wants it for shipping.
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