OK guys...if I wanted to do a Kreen cleaning on a vehicle, is it a better idea to add it to the oil (and maybe gas...voices here don't seem to be as sold on its benefits in the gas)does it matter how the vehicle will be driven afterward during the "cleaning process"? Is it better to put a quick 1,000 miles of higher speed freeway driving on a trip or wait until returned and add it which means the vehicle will see a mix of stop-and-go and some 60 mph highway driving...or DOESN'T IT MATTER?