And Dave I must just clean dirtier cars than you're used to. For one yes the engine bay is a must for heat. It saves time and engery. It also melts away all the road tar and road film on the car. Having used both a garden hose a regular cold water PW and a heated powerwasher if you seriosuly can't tell the difference then something dosen't sit right. It's night and day at the difference. How must faster and more effective cleaning out the wheel wells, The rocker panels, the engine bays Truck frames, door jambs, Bugs,... I mean it's seriously a huge difference between the 3 ways of doing it. A couple of buckets and a garden hose would take me well over an hour to just prep the car. A regular Powerwasher (cold water) probably about 30-40 minutes the heated power washer I can have the entire car prepped and ready in 15-20 minutes. And when you don;t get paid by the hour but rather by the job time is money... Not to mention I just hate doing things the long way when I know there's just much easier much faster ways of doing it correctly.