Drivers are seeing another big jump in gas prices.

According to the Fuel Gauge Report from Triple A, in Redding, the average is $4.08 a gallon, up 10 cents in the last week.   The average in Chico is $4.04, a jump of 10 cents.  The California average is up 5 cents at $4.22 a gallon.

Industry analyst Trilby Lundberg says the national price of gasoline has jumped 9 cents a gallon in the past two weeks, bringing the total increase to 40 cents over 10 weeks.
 
According to the Lundberg Survey released Sunday, the average for a gallon of regular is now $3.69. Midgrade averages $3.88 and premium is $4.02.
 
Of cities surveyed in the lower 48 states, the lowest price, $3.29 a gallon, was in Salt Lake City.

The Los Angeles Times reports every springtime, prices usually start rising as California refineries switch from winter-blend gasoline to a pricier blend of summer fuel, which takes longer to make and requires more expensive additives to meet environmental standards.

But problems at a few refineries in the Golden State undergoing routine spring maintenance have squeezed inventory and boosted prices, analysts said. Only a handful of refineries outside the state are capable of making the ultra-clean type of gasoline mandated in California.

"A couple of refinery issues have started to flare up, which is fairly normal this time of the year," said Patrick DeHaan, senior petroleum analyst at GasBuddy.com, a fuel price tracking website.

The refinery snags have temporarily reduced gas inventories in the state 17% compared with this time last year, DeHaan said.