Tier 4 Interim is here and Tier 4 Final regulations are in effect. Challenges for rental companies include the significantly rising cost of equipment as a result of Tier 4, the challenges of re-selling Tier 4 equipment internationally to other countries where the low-sulphur content fuel may not be readily available, and a look at the question of whether or not Tier 4-powered equipment will be more fuel efficient and perform on a higher level....More