Skip to main content
  • Selling Your Car? Do this to Make the Most Money
  • What Do Spark Plugs Do?
  • Why is My Engine Overheating?
  • How Do I Switch from Conventional to Synthetic Oil?
  • More AMSOIL Products Available in the Award-Winning Easy-Pack
  • Introducing the Three Newest AMSOIL Products
  • AMSOIL 2017 Year in Review (Part 1)
  • AMSOIL Heads to SEMA New Product Showcase with 13 New Products
  • 1968 Chevrolet C10 Pickup Truck Wins GM Design Award for Truck of the Year
  • Top Reasons to Switch to AMSOIL Synthetic Motor Oil
  • What Does Oil Viscosity Mean

    Oil viscosity is the measure of its resistance to flow. How quickly or slowly motor oil flows affects how well it protects your engine.

    Learn More

    Get More Great Content Delivered to Your Inbox

    Sign up for bi-weekly updates.

    *Indicates a required field.