porsche 
2006 Nissan Frontier King Cab XE 4dr King Cab SB (2.5L 4cyl 5M)
Transmission mismatch
 4 cyl. has little power, the truck weighs a lot. the gearing is poor for the engine powerband, gears are to tall, shifting puts you too low in the next gear/lugging badly. if the trans had 6 gears instead of five it may work. gas mileage at 20-21 mpg is poor for such a gutless power-plant. get the 6 cyl. and power is great and you will get 18-19 mpg. 