Driveway liquid spills/stains are easily differentiated, if not identified, by smelling and/or tasting them.

My most recent gasser automobile didn't have a belly pan and I learned the locations that mapped on to the driveway drips. None of my diesels have yet dripped a drop on to the driveway or belly pan that I know of.

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Believe nothing read or heard without verifying it oneself unless it, Weltanschauung congruent, fits ones worldview.