Changing Oil - Cold engine or warm engine?

I’m planning on getting a haircut, teeth whitening, some highly fashionable coveralls, and doing an oil change this weekend. Do you warm up the engine before you change your oil?

PROs (allegedly): All the crap that’s sitting in the bottom of the engine gets suspended in the oil, and more of it comes out. Warm oil flows better.

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CONs (allegedly): More likely to burn yourself. All the crap that’s sitting in the bottom of the engine is now all over the engine, instead of conveniently in the bottom.

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