1969 Ford Mustang Boss 429 Nascar #1613 on 2040-cars

Auto blog

Which is more fuel efficient, driving with a pickup's tailgate up or down?

Thanks to the smoke wand in the wind tunnel, you can actually see the difference in our video.
Should you drive with your pickup truck's tailgate up or down? It's an age-old controversy that's divided drivers for decades. Traditionalists will swear you should leave the tailgate down. Makes sense, right? It would seem to let the air flow more cleanly over the body and through the bed. But there's also a school of thought that argues trucks are designed to look and operate in a specific manner, and modern design techniques can help channel the airflow properly. So don't mess with all of that: Leave the tailgate up.

Ford made three big mistakes in calculating MPG for 2013 C-Max Hybrid

It's been a rough time for the official fuel economy figures for the Ford C-Max Hybrid. When the car was released in 2012, Ford made a huge deal about how it would beat the Toyota Prius V, which was rated at 42 combined miles per gallon, 44 city and 40 highway. The Ford? 47 mpg across the board. How did Ford come to this place, where its Prius-beater turned into an also-ran? Well, after hearing customer complaints and issuing a software update in mid-2013, then discovering a real problem with the numbers last fall and then making a big announcement last week that the fuel economy ratings of six different 2013 and 2014 model year vehicles would need to be lowered, the C-Max Hybrid has ended up at 40 combined, 42 city and 37 highway. In other words, the Prius trumps it, as daily drivers of those two vehicles have known for a long time. The changes will not only affect the window sticker, but also the effect that the C-Max Hybrid (and the five other Ford vehicles that had their fuel economy figures lowered last week) have on Ford's compliance with greenhouse gas and CAFE rules for model year 2013 and 2014. How did Ford come to this place, where its Prius-beater turned into an also-ran? There are two technical answers to that question, which we've got below, as well as some context for how Ford's mistakes will play out in the bigger world of green vehicles. Let's start with Ford's second error, which is easy to do since we documented it in detail last year (the first, needing to do a software update, was also covered). The basic gist is that Ford used the general label rule (completely legally) to test the Fusion Hybrid and use those numbers to figure out how efficient the C-Max Hybrid is. That turned out to be a mistake, since the two vehicles are different enough that their numbers were not comparable, despite having the same engine, transmission and test weight, as the rules require. You can read more details here. Ford's Said Deep admitted that the TRLHP issue is completely separate from the general label error from last year. Now let's move on to last week's announcement. What's interesting is that the new recalculation of the MPG numbers – downward, of course – was caused by a completely separate issue, something called the Total Road Load Horsepower (TRLHP). Ford's Said Deep admitted to AutoblogGreen that the TRLHP issue had nothing to do with the general label error from last year.

Junkyard Gem: 1993 Mercury Topaz GS Sedan

As long as the Mercury brand existed — a period spanning the 1939 through 2011 model years — nearly every Mercury sold in the United States was more or less a redecorated Ford model. The Torino had its Montego sibling, the Crown Victoria had the Grand Marquis, the Cougar was based on everything from the Mustang to the Mondeo, and so on. Naturally, when the folks in Dearborn developed the Ford Tempo compact, a Mercury version had to be created. This was the Topaz, with the official launch of both cars taking place on the deck of the aircraft carrier often referred to as the USS Decrepit. You can't make this stuff up! The Tempo/Topaz, also known as the Tempaz, has largely faded from our collective automotive memory by now, since it broke no significant new engineering or styling ground (this story would be much different if Ford had only put the amazing straight-eight "T-Drive" Tempaz powertrain into production) and didn't have any endearing features other than being a cheap domestic competitor to the Toyota Corolla and Nissan Sentra. Still, close to 3 million Tempazes left North American Ford and Lincoln-Mercury showrooms during the 1984-1994 period. As you'd expect, most of these disposable cars disappeared from both the street and the car graveyard long ago. It takes a very special Tempaz for me to break out my camera while I'm patrolling my local wrecking yards; generally, this means an ultra-rare all-wheel-drive version or at least a very early model in super-clean condition. Today's Junkyard Gem is neither, but I took one look at this spectacular Bordello Red crypto-velour-and-slippery-plastic interior and recognized that this was no ordinary junkyard Mercury. It appears that Mercury had dropped the idea of clever names for base-grade seat fabrics by the time of the Topaz, referring to this stuff as just "cloth" in all the brochures I could find. That's too bad, because Mercurys had cool names for upholstery (e.g., Chromatex) in the old days. The interior is in very good condition but the steering wheel shows substantial wear, so I think this is a high-mile Topaz that got meticulous care from its owner or owners. Ford used five-digit odometers on these cars until the end of production, however, so we'll never know if this reading indicates 65,404 miles or 365,404 miles. The body is very straight, but there's some nasty corrosion behind the right front wheelwell.