Spied: 4.4-Liter V8 Diesel F-150 Mule
By: Mike Levine / Brenda Priddy and Co. Posted: 04-12-08 09:00 PT
© 2008 PickupTruck.com, Brian Williams for Brenda Priddy & Company

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Update #2: 04-29-2008 10:45 PT

This picture arrived moments ago. It's another F-150 mule running with the new 4.4-liter diesel V8, but this time the front half is next-generation F-150 while the back half is from the current truck.

Again, you can see 7-lug wheels indicating that Ford will add the Heavy Duty Payload Package as an option for 2010.5 SuperCrew F-150s.

With an F-150 this capable, why would you need an F-250?

Update #1: 04-29-2008 10:32 PT

While I was so enamored with the twin tailpipes, sharp eyed Robert Holland at Edmunds Straightline Blog noticed the truck's 7-lug steel wheels. Those same rims are currently available only on Ford F-150s with the optional Heavy Duty Payload Package (which increases the gross vehicle weight rating to 8,200 lbs and adds heavy duty shocks, springs and an upgraded rear axle).

What's interesting about this is that today you can only order the HD Payload Package for Regular and SuperCab models. So, it looks like Ford will be extending the HD Payload Package for the first time to the F-150 Super Crew model. You'll be able to haul big payloads livin' large.

Nice catch Bob!

Truck manufacturers can try to disguise a new pickup with different sheetmetal or vinyl camouflage, but when it comes to future diesels the tailpipes are always the giveaway.

The Ford F-150 pictured above (top photo) is an engineering mule for the 2010.5 model, even though it's wearing the skin of the current generation F-150. Under its hood is the new 4.4-liter V8 diesel engine that Ford has promised its dealers will achieve a 20% improvement in fuel economy over the F-150's 5.4-liter V8 gasoline motor.

Similar to the Hummer H2T prototype (which, by the way, sources say, has been killed) spied a few months back, this F-150 has borrowed the rear exhaust system from its diesel-powered heavy duty big brothers.

The truck's twin tailpipes help to quickly cool extremely hot exhaust gases expelled when the vehicle's diesel particulate filter 'regenerates' to prevent diesel soot from polluting the air. The same setup is used in 2008 model year Ford Super Dutys with 6.4-liter Power Stroke V8 diesel engines (see picture below).

The 2010.5 Ford F-150 will also use urea Selective Catalytic Reduction (SCR) to reduce nitrogen oxide (NOx) emissions, so it's compliant with US federal EPA regulations for 2010. A urea tank will have to be refilled periodically during routine maintenance on the truck.

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