Any good Mechanics(NISSAN) that anyone can recommend in Los Angeles

Any good Mechanics that anyone can recommend in Los Angeles. Nothing much wrong with my car just low fuel mileage, but don't want to take it to the dealer.( they charge to much).

if you live in west la, pico blvd half a mile west of the 405. advanced auto clinic. they did my clutch, new axel, and slave cylinder for 670.