Vehicles 10 years or older will incur an extra charge of $20.00 minimum. Prices for older vehicles are based on the amount of oil and grease build-up. Due to difficulty certain makes and models incure an extra charge.*Certain vehicles, although less than 10 years old, start at $165.00 due to moisture sensitivity and the extra difficulty in stream-cleaning them. Some of these are Mercedes Benz, Porshe, Jaguar, Cadillac, BMW, Corvette, Lexus Infiniti, Alfa Romeo, Bentley, Rolls Royce, Ferrari.