General: the car wash logo should mainly show a car feeling good in a jacuzzi. Not more than 3 colors (b/w excluded), red is a must. The logo should not inspire an expensive service, but rather a friendly one.
Option 1: Logo shows one car that should not be an exclusive model. A VW Beetle would do.
Option 2: Logo shows 2 cars, one luxury and one popular, each in it's own jacuzzi.
Option 3: Logo shows one car that just got out of the jacuzzi and is being wiped dry, waxed etc. No sexual allusions.
Option 4: ANY good idea that is suitably illustrated.
Good luck !!!