Rather than wait for the 2009 model year to roll around, Ford has decided to introduce two new fuel saving changes to the 2008.5 Super Duty that should improve fuel economy for the big trucks by about 1.5 mpg. That may not sound like much, but for vehicles that barely break the double-digit barrier in mpg, it's a big improvement. The changes include reducing the rear axle ratio on certain F-250 and F-350 models and extending their underbody chin spoilers by 3.93 inches. If you're a truck person, you're no doubt wondering how Ford will maintain the maximum tow rating for these trucks while reducing their rear axle ratios. With big trucks, a higher rear axle ratio means more towing capacity, while a lower rear axle ratio provides better fuel economy. In this case, Ford says that these Super Duty trucks will still be able to tow the same amount of weight as before, though our friends at Pickuptruck.com suspect that 0 to 60 performance and acceleration in general, especially while towing, will drop. Click here to view the specific changes for each iteration of the Super Duty that's affected.

[Source: Pickuptruck.com]

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