What does it mean when a company says their products are biodegradable?

Are the OEM brand lubricants better for my machine?

Can we mix oils?

What are the different additives and how do they work?

What is viscosity range?

How do you measure viscosity and what's the viscosity index?

What is the effect of oxidation and how do we avoid it?

Where do synthetics come from?

What is the particle count index number and how does it effect my machine?

What can color tell you about your oil?