1994 Honda Civic Owner's Manual - Page 114

Engine Oil Recommended Oil Oil is a major contributor to your engine's performance and longevity. Always use a premium-grade detergent oil. You can determine an oil's SAE viscosity and Service Classification from the API Service label on the oil container. A fuel-efficient oil is recommended for your Honda. This is shown on the API Service label by the words "Energy Conserving II." This oil is formulated to help your engine use less fuel. The API Service label also tells you the service classification of the oil. Always use an oil that says "API Service SG or SH." This service rating may also include other designations, such as CD. These additional classifications are not a problem, as long as the label also carries the SG or SH classification. An oil that is only classified SF is not recommended. The oil container may also display the API Certification seal shown below. Make sure it says "For Gasoline Engines." API CERTIFICATION SEAL Maintenance