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I use the Rotella. It seems to work really well. Yeah, I think it DOES stink, especially after an oil change. While I'm installing my FASS, I plan on extending the by-pass line past the cab to help keep the smell out of the cab.
I'm running Rotella in mine now. Yes, it does stink for a bit after an oil change, especially if you get a few drops on the manifold. Eeeeewwwww! [:'(]