We all love the 4.8 for its power and they are both thirsty engines. Having driven dad's 4.5 a bit over the past few weeks is the 4.8 any thirstier? According to Nissan the 4.8 is rated at 17.2ltrs/100 (pfft, yer right). I couldn't find the Nissan figures on the Nissan 4.5 though.