Higher API gravity influences surface facilities in what way?

• A. Heavier oil requires more heating
• B. Lighter oil (higher API) generally improves separation efficiency
• C. API has no impact on separation
• D. Higher API reduces storage capacity

Answer: (B)

Higher API gravity means the crude is lighter and less dense, often with lower viscosity. In surface facilities, separation relies on gravity: water settles downward and oil rises to the top. When the oil is lighter and flows more readily, droplets coalesce faster and the oil-water interface becomes more distinct, so gravity-based separators work more efficiently. That’s why lighter crudes (higher API) generally improve separation efficiency. The other ideas don’t fit as well: heavier oil (lower API) tends to be more viscous and harder to separate, API does impact separation because density and viscosity drive how well phases separate, and storage capacity isn’t directly dictated by API in a meaningful way.