I had changed the oil in my wife's vehicle, but apparently did not get the oil cap back on as securely as it needed to be - which resulted in a fair amount of engine oil being distributed under the hood. Thankfully, my wife noticed the missing cap before the engine sustained damage or the oil degraded hoses and belts, but there was a fine film of oil coating most of the exterior parts of the engine. So she called around and determined that Groff's offered a service to steam the engine. We took the vehicle there and Groff's was able to get the cleaning done the same day.