Those intrepid sleuths over at PickupTrucks.com have noticed an underhood sticker that may offer an early glimpse into the upcoming small-displacement diesel engine for the 2010 Dodge Ram. We've really got to hand it to Mike Levine and his crew for this one. You've really got to be dedicated to check every little sticker and plaque on a new car to notice that the automaker has inadvertently listed the displacement for a future engine on the air conditioner's R-134a sticker. Fortunately, their every nook-and-cranny nitpicking shows that the Dodge will likely offer a 5.0-liter turbodiesel V8 engine from its long-standing diesel engine partner, Cummins, in the 2010 Ram. This new powerplant will join the 4.4-liter diesel from Ford and the 4.5-liter oil-burner from General Motors in the light-duty diesel truck market. These new diesels will offer more power than their gasoline-fed siblings along with 25-percent better fuel economy. Truck-makers hope they'll spark a pickup revival of sorts, and we have high hopes for them as well. Let the battle begin!