How does motor oil get its winter viscosity rating like 5W, 10W, etc? How are foam and aeration tested? How does it hold up to severe oxidation and what corrosion protection does it offer? What effect do oil additives have on metals they claim to protect? These are just a few of the questions answered as Gale Banks continues his lubrication education in Speed School, Episode 3 of our 4-part series. Links below. Ep 1: How synthetic motor oil is made https://www.youtube.com/watch?v=-ZYSrLI34FA Ep 2: Motor oil chemistry lesson https://www.youtube.com/watch?v=9rEGIB2F8qA Ep 3: Motor oil chemical lab testing https://www.youtube.com/watch?v=NuX1tWwLjy8 Ep 4: Motor oil mechanical lab testing https://www.youtube.com/watch?v=mnseEdDSVDM 00:00 Intro 01:30 Cold-cranking simulator 02:40 Viscosity baths 04:15 Measuring elements 06:30 Measuring water 08:30 Measuring particles 09:52 Volatility testing 10:50 Measuring oil's resistance to wear 13:40 Measuring foam 16:25 Oxidation testing 18:25 Corrosion resistance 22:00 Cold pour testing Thanks to https://www.youtube.com/channel/UChdADKjKESNcnzjZc2JGQww for the tour and education! #science #chemistry #howto