Sales for the month of October 2008 were... ahem... not good. The auto industry in the U.S. has found a way to slide further into oblivion with only a few bright spots from Audi and MINI, the latter of which enjoyed monster sales last month we suspect on account of greater production capacity this year versus October 2007.

While all the major players were down, General Motors, the largest of them all, was hit the hardest. Its sales volume for October 2008 fell 45% compared to last year. It went from selling an average of 11,923 cars per day in October 2007 to just 6,318 last month. Each of its brands were down, with HUMMER taking the Biggest Loser crown (yet again). The real story, however, is how close behind the other brands were, with Cadillac falling 55.1%, Buick 46.3%, Chevy 40.3%, GMC 52.5%, Pontiac 48.2% and Saturn 54.6%.

We're not waiting for Suzuki to reveal its September 2008 sales results any longer, as it is highly unlikely that the little Japanese brand will arise as the only brand/automaker to post positive numbers this month. Take a good look below, as it's the first time since we started publishing sales data back in mid-2006 that every single brand and automaker is in the red. It doesn't matter how you slice it, whether you look at the change in volume from Sept. 2007 to Sept. 2008 or if you consider the change in the Daily Sales Rate. Everyone is down.

For the record, we suppose Audi is this month's Biggest Winner with a sales drop of just 5.4%, while HUMMER is again our Biggest Loser with a 54.8% fall in sales. You can peruse the rest of the carnage below for yourself.

Check it out. We've completely revamped By the Numbers to convey more sales information than before in a much easier to digest way. Now we'll be reporting both the change in monthly sales volume for each brand and automaker as well as the change in their Daily Sales Rate or average number of vehicles sold per day. On to the armchair analysis...

NOTE: There were 26 selling days in July 2008 versus 24 selling days in July 2007. All percentages are the change in the average number of vehicles sold per day or Daily Sales Rate (DSR), not the difference in actual number of vehicles sold for each month.

This is an easy month of sales to report. Every brand and automaker sold fewer vehicles per day on average in July 2008 versus July 2007 except for Mercedes-Benz, MINI, Nissan and Nissan North America.

You're going to be reading in the mainstream press about how horrible sales were in the U.S. during June, 2008. Yes, they were bad for many automakers, but consider that there were only 24 selling days last month versus 27 days in June, 2008. This makes comparing raw sales numbers misleading, since there were three fewer days to sell. Thus, as always, all the percentages below represent the change in Daily Sales Rate, i.e. the average number of vehicles sold per day, not the change in raw number of vehicles sold.

Honda Civic, Accord, Toyota Camry and Corolla all outsell Ford F-150 for the first time

Remember when I said February 2008 was the worst month ever in the history of our reporting monthly sales figures? Well, April 2008 was just as bad. Though we had five brands this month that posted an increase in their daily sales rate (DSR) compared to four back in February, automakers had two extra days last month to sell compared to April 2007. Not even that helped as most brands went down flaming with double-digit dips in their DSR*.

Though many news outlets will decry March as a horrible sales month in the auto industry, it wasn't that bad and there are some notable successes. The reason it isn't as bad as some will tell you is because most outlets compare the volume of cars sold last month to the same month in 2007, rather than comparing the average number of cars sold per day. Since there were two extra selling days last year (28 vs. 26), looking at the raw numbers is very misleading. All of our numbers below represent the change in the Daily Sales Rate (DSR) rate, so some brands that actually sold less overall did well by selling more cars per day.

February 2008 will go down as the ugliest sales month ever in the history of By the Numbers posts. Out of the 35 brands we track, only four improved their daily average sales rate versus the same month last year: Honda (1.9%), Mazda (2.5%), Mercedes-Benz (3%) and our Biggest Winner, MINI (38.5%). Leap year is to blame, as the rare return of February 29th offered most automakers an extra to day to suck.