Invest and save - don't put more money into an asset which looses value every day!!!!
The only circumstance would indeed be if your investments actually provide you will less return than the interest on the note (which you indicated is not the case).
2012 335i, saphire black, coral red leather interior, sport line, sport suspension, 6mt, premium package
2011 Lincoln MKX, black on black, premium package - that's right! Techno-Groovy baby