Well I hate to say it, but there IS a reason that I have been warning people that this stuff is nasty, at least from a chemical & personal safety standpoint. Come on people – think about it here; this stuff is removing CARBON! FYI Carbon is a very stable element - It isn’t exactly easy to remove from surfaces via chemical reaction.

X-66 should NOT be thought of in the same light as typical over-the-counter type products. It was never intended for use by anyone other than professionals. You don’t exactly see this stuff marketed like the latest snake-oil ‘miracle in a can’ on late night TV. When the directions state a given time period for this stuff to sit in your engine, FOLLOW THE DIRECTIONS. Or better yet, if anyone is contemplating using it, and you have ANY doubts whatsoever as to what to do or how to do it, the best advice is DON’T use it.

As far as damage to your engine, pmizel, I can’t tell you what has happened. Did you really blow “about a quart of oil in that plume of smoke”? Burning a quart of oil in a quick jaunt around the neighborhood is NOT a good sign. I do know that X-66 should not be left sitting on aluminum for extended periods of time. Some alloys may be O.K., others may not be O.K., but do you really want to push the envelope?

Sorry if I am sounding harsh here, and I truly hope that your engine is OK. People learn from both their experiences & mistakes, as well as those of others. That is where this forum is an invaluable resource. I would just hate being in the shoes of the person that *makes* the mistake, although others will benefit.

Best Of Luck to you
RTH