1993 Chevrolet Lumina Owner's Manual - Page 205
1993 Chevrolet Lumina Manual
Page 205 highlights
S A E 5W-30 As shown in the viscosity chart, SAE 5W-30 is best for your vehicle. However, you can use SAE 1OW-30 if it's going to be 0°F (-18°C) or above. These numbers on an oil container show its viscosity, orthickness. Do not use otherviscosity oils,such as SAE 1OW-40 or SAE 2OW-50. GRADE MAY BE USED AT TEMPERAT ABOVE 40 DEGREES F (4 DEGREES C Energy Conserving I1 Oils with these words on me container will help you save fuel. This doughnut-shaped logo (symbol) is used on most oil containers to help you select the correct oil. You should look for on the oil this container, and use only those oils that display the logo. GM Goodwrench@ Oil(in Canada, GM Engine Oil) meets all the requirements for your vehicle. Engine Oil Additives Don't add anythingto your oil. Your Chevrolet dealer is ready advise if to you think something shouldbe added.