HOUSTON, May 8 (Reuters) - May-delivery CARBOB gasoline jumped 12 cents a gallon in the San Francisco Bay spot market on Wednesday after a Bay-area refinery reported shutting a crude unit earlier in the week, traders said.
Royal Dutch Shell Plc (LSE: RDSB.L - news) 's 156,400 barrel per day (bpd) refinery in Martinez, California, shut a unit on Monday night following a leak of "pitch-like material" from an isolation valve on the unit, according to a notice filed with California pollution regulators and released to the public on Wednesday.
CARBOB sold in the Bay market at 37 cents a gallon over June NYMEX RBOB gasoline.
May CARBOB rose 3 cents a gallon in the Los Angeles spot market to 45 cents a gallon over June RBOB as Exxon Mobil Corp continued planned maintenance that has shut several units at its 149,500 bpd Torrance, California, refinery.
In the Portland, Oregon, market, May gasoline held at 55 cents a gallon over June RBOB gasoline due to the shutdown of the gasoline-producing fluidic catalytic cracking unit at Tesoro Corp's 120,000 bpd Anacortes, Washington, refinery.
May CARB diesel strengthened in the Los Angeles and San Francisco markets due to the refinery problems. In L.A., CARB diesel climbed 1.5 cents to 2.75 cents a gallon over June NYMEX heating oil. In the Bay, CARB diesel climbed 7 cents to a 5-cent premium over June heating oil.
Diesel in Portland rose 1 cent to 7 cents a gallon over June NYMEX heating oil.
L.A. May jet fuel rose 0.25 cent to a discount of 7.5 cents a gallon under June heating oil. (Reporting by Erwin Seba; Editing by Bob Burgdorfer)