Draining the oil
They were eager to begin once they had left Home Depot. One of them volunteered to use his automobile for the study, fully understanding that many things might go wrong. However, before they could put the WD-40 in his car, they had to drain the existing oil that was already there.
“We’ll get rid of all of this,” one of the happy teens declared. Now that they had gotten rid of the automobile oil, it was time for WD-40 to take center stage.