API gravity is defined as API = (141.5 / SG) - 131.5. Higher API indicates what about the oil?

API gravity is defined as API = (141.5 / SG) - 131.5. Higher API indicates what about the oil?

• A. Heavier oil
• B. More viscous oil
• C. Lighter oil
• D. Lower sulfur content

Answer: (C)

API gravity tells you how dense the crude is relative to water. The formula shows API increases as SG decreases, so a higher API means the oil is less dense and therefore lighter. Heavier, more dense oils have lower API values. Note that API does not directly indicate sulfur content, and while lighter oils often flow more easily (lower viscosity), API specifically measures density, not viscosity or sulfur.

API gravity tells you how dense the crude is relative to water. The formula shows API increases as SG decreases, so a higher API means the oil is less dense and therefore lighter. Heavier, more dense oils have lower API values. Note that API does not directly indicate sulfur content, and while lighter oils often flow more easily (lower viscosity), API specifically measures density, not viscosity or sulfur.