The price of gas inched up just over 2 cents a gallon around the nation in the past two weeks.

The national average for self-serve regular was $2.29 a gallon, industry analyst Trilby Lundberg said Sunday.

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The average for mid-grade was $2.40, while premium was $2.50 a gallon, according to Lundberg's latest survey of 7,000 gas stations across the country.

The price is about 8 cents a gallon higher than the same period last year.

The cheapest gas in the country was found in Tulsa, Okla., where the price of self-serve regular was $2.10. The highest average price for that grade was $2.74 a gallon in Honolulu.

California prices increased almost 8 cents a gallon from two weeks ago.

Among California cities surveyed, the highest price was in San Diego at $2.59 a gallon. The lowest was in Sacramento at $2.46.

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