The war with Iran has sent oil prices, and then gasoline prices, sharply higher. West Texas Intermediate (WTI) crude, the main U.S. oil benchmark, rose from the mid-$60s per barrel in late February to around $100 on March 19. U.S. gasoline prices have followed suit, with the average price increasing from a pre-war level of under $3.00 per gallon to over $3.70 by mid-March.