[chevypower]

The problem with the 5.4 is it has a lot of friction. The long stroke has too much friction for my liking, the pistons have to increase speed just for the crankshaft to turn at the same rate. Plus having extra valves, and on the DOHC version, 4 cams and 32 valves. That equals parasitic loss. Also, I hate the spark plug issue. Other than that, the low end torque delivery and throttle response is fantastic. Fantastic for pulling heavy loads. The upper RPM range lacks power delivery, and overall fuel economy is crap. Give me an EcoBoost.