The Great Oil Debate

An archived 2001 American Iron Magazine article by Ed Newman examining the synthetic motorcycle oil debate, including Harley-Davidson lubrication, engine heat, oil chemistry, friction modifiers and warranty concerns.

The True Measure of Lubricant Quality

This 2003 article by Ed Newman explains how lubricant quality is measured, covering viscosity, cold-start protection, wear control, volatility, fuel economy and the differences between synthetic and conventional motor oils.