Caseys Car Wash at 218 South Rancho Santa Fe Road, San Marcos, California.

$2.50 minimum required to use. On a Sunday several people were here cleaning cars and an open bay was easy to find. The power wash and rinse were good. The foam brush was not as good as I'm accustomed elsewhere: generally dribbled or poured out and dribbled worse on vertical surfaces, yet did get soap on the car. Spot-free rinse comes from its own hose, which is a nice touch since it's low-flow; it seemed fairly effective as we just used a freeway dry rather than any towels. Recommend trying a trick: 1. spend $2.50 to power wash and foam brush a car, letting time run out as you continue to brush suds still left on the car; 2. spend another $2.50 to power rinse and spot-free rinse - worked well on a small car. Didn't use vacuums. Convenient access from Hwy 78.