Originally Posted by Brent

I believe our Crossfires are OK to overfill since there is no warning in the owner's manual. And welcome to the forum.

One thing I've noticed is that after having the new tank installed, the filler neck can be moved around a tad. I never noticed that before, but then again I wasn't shifting the nozzle around before either. Can anyone else get their filler neck to move a little bit?

Originally Posted by AMGLover

You can't overfill the car due to an overfill check valve - not to be confused with the filler neck check valve - in the tank. Yes the neck is fee floating - if it was fixed it would develop stress cracks and leak... Pray do update us after the "exerts from Dover" (obscure reference to Mash the movie) leave...