The recent run-up in fuel prices for gasoline and diesel has commercial truck fleet managers and operators once again re-evaluating their fuel strategies and options. Last week, the Department of Energy reported diesel rose 5.3 cents to $4.157 a gallon -- its fifth straight increase. This is highest price for diesel in about four-and-a-half years. Gasoline also rose significantly with nine consecutive increases and it has reached a high unseen since last October at $3.747. In periods like this it’s a good idea to focus on fundamentals when you are operating a fleet of trucks or even just one truck.