California environmental law requires a state-specific blend of gasoline that is only distilled by a few refiners in California. Gasoline cannot be trucked in from Oregon or Arizona because they don't use California's prorietary gasoline blend.
Scarcity creates value (higher price, cost, worth). By locking Californians into using a state-properietary gasoline blend only refined in California by a handful of refineries, California loses access to a more fungible supply of a regional gasoline blend. Fewer suppliers and less supply, dictated by California state laws, drive up market prices.
For California drivers and transportation companies, the enemy is the short-sighted, market-ignorant, radical, Marxist, Stalinst legislature and Governor of California.
Government is the cuase for higher energy costs. Government is to blame for higher housing costs. Government is to blame for a flood of illegal immigrants draining community resources. Only less Government will solve those problems.
Californians need only to look at their Politburo in Sacromento as the singular cause of higher gasoline prices paid by Californians.