Originally Posted by heavyD
I don't know about that. I know and have heard people with that engine in Mazdaspeed 6's and CX-7's that grenaded stock. It's never been a particularily reliable engine.
I can't speak for all of them, but I experienced audible knock on my MS3 with some regularity. Not at high RPM, so it may never have blown up, but not a sound you want to hear when you mash the go pedal. Must have been timing related, because it certainly wasn't running lean
. When you can see the black smoke behind you, it may mean you're running a tad rich...
How similar is the new ST engine to the old mill the MS3 has?