More good news for the Germans: Mercedes' April sales went up 4.4 percent. Nice!

Porsche sales go up 29 percent in April. Best month ever for the P cars from Stuttgart. Those sales don't include the one man who bought a 928.

GM's April was also excellent, in fact, it was the best April in five years. Positives for each brand, especially Cadillac which posted a 24.5 percent retail gain.

Ford and Lincoln had a great April. Ford was up 18 percent and Lincoln up 21 percent, with more than 4,000 MKZs sold. Great work.

Honda's sales went up 5.3% in March to 121,938 cars while Acura went up a staggering 26.3% to to 14,100 cars sold. Way to go you guys!

Toyota's sales were also up 1% compared to March 2012. That was enough for the three companies combined to be the number one retail manufacturer. Beige FTW.

Nissan sales were up just 1% over March 2012, but that was enough to make March 2013 the best sales month the company has ever had in the USA.

Infiniti sales went up 9% last month compared to March 2012. They sold fewer cars and more crossovers/trucks. I don't have anything else to add.

March 2013 was Audi's second best month ever in the US with 13,253 cars sold. Increases were led by the A4, A5, Q5, and Q7. That's an increase of 14.4% compared to March 2012.