What engine oil viscosity should you use? Engineer and Mechanic discuss best options.

What engine oil viscosity should you use? Engineer and Mechanic discuss best options @Simez7779 Automotive Press is owned and managed by David Koichi Chao, a global expert in the field of automotive evaluation, engineering, and strategy. With over 35 years of engineering experience, David is able to review vehicles from unique perspectives utilizing technical and specialized methods. David is a board member and a Vice President at AJAC (Automobile Journalist Association of Canada). David is known around the world as an authentic specialist of Lean/Agile Thinking, and travels all around the world to review vehicles and teach latest engineering methods. Born and raised in Japan, David has an engineering degree from University of British Columbia and post-graduate executive education from MIT and Harvard Business School in Boston.