1993 Buick Century Owner's Manual - Page 233

If you have the 2.2L LA engine use: LOOK IR T I H LABEL S A E 5W-30 As shown in this 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 onan oil container show its viscosity, or thickness. Do not use other viscosityoils such as SAE low-40 or SAE 20W-50. Energy ConservingII Oils with these words on the container will help you save fuel. This doughnut-shaped logo (symbol) is used on most oil containers to help select thecorrect oil. you You should look for this on the oil container, and use only those oils that display the logo. SAE 1OW-30 GM Goodwrench@ Oil (in Canada, Engine Oil) GM meets all the requirements f your vehicle. i x AE 5W-31 REFERREI IF NEITHER SAE 5W-30 NOR SAE 1OW-30 GRADE OILS ARE AVAILABLE, SAE 30 GRADE MAY BE USE0 AT TEMPERATURES ABOVE 40 DEGREES F (4 DEGREES C). 00 NOT USE SAE 1OW-40, SAE 2OW-50 Ofl ANY nTHFR CRAllF nll Nil1 RFfnMMFNnl Engine Oil Additives: Don't add anything to your oil. Your Buick dealer is ready to adviseyou t i k if h n something should be added. 2.2L L4 Engine 231