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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.

Watch this week's Top Gear America used-car challenge

Top Gear America is back for the penultimate episode of the first season. Used car challenges were some of the highlights of the original UK edition. In our exclusive clip, Tom Ford, Antron Brown and William Fichtner run their $7,000 sports cars in a drag race. As expected, the trio chose very different cars for the challenge. Watch the video to see if a Subaru WRX's all-wheel drive can overcome a power deficit to beat a Ford Mustang and a Chevy Corvette. Brown and Fichtner also spend some time relaxing with an old Jeep Wagoneer. Like them, we're really hoping Jeep will bring back the Wagoneer nameplate. Brown also drives a Maserati Levante, proving that not all family cars need be boring. This week's guest star is actor, rapper and former host of Pimp My Ride, Xzibit. Top Gear America airs Sundays at 8 p.m. Eastern on BBC America. Related Video: Celebrities TV/Movies Chevrolet Ford Subaru Top Gear exclusive top gear america

Gary Cooper's 1935 Duesenberg SSJ fetches record price at Pebble Beach

The 1935 Duesenberg SSJ formerly owned by Gary Cooper sold for a jaw-dropping $22 million over the weekend at the Gooding & Co. Pebble Beach auction, setting a record for the most valuable pre-war car ever sold at auction. It also appears to have become the most expensive American collector car ever sold at auction, eclipsing the very first Shelby Cobra ever made, which sold for $13.75 million in 2016. The Duesenberg was also the lone American-made entrant in the list of top 10 sellers, which was crowded with the names Ferrari and Porsche. You have to go all the way down the list to No. 21 to find the next American car: a 1930 Packard 734 Speedster Phaeton, which sold for a mere $1.127 million. All told, Gooding & Co. said it realized more than $116.5 million in auction sales over the weekend, with a whopping 25 cars sold for north of $1 million, an 84 percent sales rate and an average transaction price of $947,174. Clearly this is how the other half 1 percent lives. Gooding & Co. said there were five world-record sales at the auction. Joining the Duesenberg were a 1955 Ferrari 500 Mondial Series II, which sold for $5.005 million; a 1958 Ferrari 250 GT Tour de France Berlinetta, $6.6 million; a 1967 Ferrari 330 GTC Speciale, $3.41 million; and a one-of-two 1966 Ferrari Dino Berlinetta GT, $3.08 million. Oh, and that 1969 Ford Bronco test vehicle we told you about? The one that was rebadged by Holman & Moody as a Bronco Hunter? It sold for $121,000, which was well below the expected range of $180,000 to $220,000. Perhaps it was the presence of all those gorgeous Porsche Spyders and Ferraris that meant collectors weren't interested in boxy, utilitarian off-roaders. View 24 Photos Gooding and Co. had expected the convertible Duesenberg coupe to go for more than $10 million. It was one of only two of its kind built by Duesenberg — the other having gone to Clark Gable — with a specially shortened, 125-inch wheelbase and a supercharged straight-eight with double overhead cams, able to produce around 400 horsepower and a top speed of 140 miles per hour. It features a lightweight open-roadster bobtail body produced by LaGrande out of Connersville, Ind. The car was also owned at one point by race driver Briggs Cunningham.