NYMEX March RBOB gasoline slipped 0.1% to $1.9080 per gallon Tuesday, while U.S. average pump prices held at $2.917, AAA reported. Refiners Valero, Marathon, and Phillips 66 dropped 1%-2% as crude oil hit a two-week low on U.S.-Iran nuclear talks. California faces higher costs as it imports more gasoline amid refinery closures. A drone attack set fire to Russia’s Ilsky refinery, Russian officials said.