Limited oil supplies worldwide, a result of the ongoing war in Iran, are having a major impact on gas prices across the U.S. As of March 30, the national average cost of gas had gone up by 2.4 cents per gallon week over week and by 97.9 cents per gallon in the past month, according to data from GasBuddy. Americans are now paying $3.95 per gallon for gas and $5.369 per gallon for diesel fuel. AAA data tells a similar story. The current AAA national average gas price is about $3.98 — a full $1.00 increase fr ...