Originally Posted by
volleyca
If you are coming from San Francisco, take the San Bruno exit (marked rental car return). If you need to gas up, turn right instead of left at the light. After refueling, you turn left and go back over the freeway, and make a right at first road (a T) and follow to the rental return.
There is also a Costco gas station near the rental car center if you have membership. Found this out
after filling up at a non-Costco gas station and driving the car to return it.