1-Year Diesel Price Graphsource: thefinancials.comToday's nationwide average diesel price is $3.95 per gallon.3-Year Diesel Price Graphsource: thefinancials.comThe record price for diesel was set in July, 2008, at $4.76 per gallon.Some analysts listed the price of diesel as one of the reasons the IEA announced plans to release oil from the emergency reserves last week.Earlier this year, I