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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.

Submit your questions for Autoblog Podcast #319 LIVE!

We record Autoblog Podcast #319 tonight, and you can drop us your questions and comments regarding the rest of the week's news via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
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Ford recalls EcoBoost-powered F-150 and SUVs for brake fluid leak

Ford is recalling approximately 280,000 trucks and SUVs equipped with its 3.5-liter EcoBoost engine to address a potential brake fluid leak. The recall covers the 2016-2017 Ford F-150, 2016-2017 Ford Expedition and the 2016-2017 Lincoln Navigator.  According to Ford's defect report, the issue stems from contamination in the brake fluid causing degradation or damage to the seals in the brake master cylinder, allowing fluid to escape. Ford says that braking performance is not immediately impacted by the leak, and owners may not realize there's a problem until a brake malfunction indicator appears in the cluster, accompanied by a chime.  "If the brake fluid in the reservoir is depleted to a predetermined level, the driver will receive an audible chime, message center alert, and red brake warning indicator in the instrument cluster," Ford said in its defect report to NHTSA. "If the driver continues to operate the vehicle, the drive may begin to experience a change in brake pedal travel and feel, and increased pedal effort." "If a loss of brake fluid is substantial enough to reduce brake function to the front wheels, full braking function would remain in the rear wheel circuit. However, reduced brake function in the front wheels can extend stopping distance, increasing the risk of a crash," Ford said.  The issue can be addressed with a replacement brake master cylinder, which Ford will install free of charge. Ford has already begun notifying dealers and will send notices to customers starting in April.  Recalls Ford Lincoln Ownership Safety Truck SUV