1998 Buick Park Avenue Owner's Manual - Page 278

Fyour vehicle Is certified to meet California Emission ! Sbmdirrds (indicated the underhood emission control i d x l ) , it is designed to ogerate on heEs that meet C"a1Eforniaspecificztions. If such fuels are not available states adopting California e:raissions standads, your i ~ h i c f e operate satisfactorily on fuels meeting will fktPeral specifications, but emission control system ;?crt'om.srmmce be afiected. The maTfunctian indicator may Fmrp OR your instrument panel may turn on and/or your v & k k may fail a smog-check test. If this occurs, return t o y w r nlrtEnorlzed Buick dealer Ear diagnosis to To provide ckaner air, a11 gasdines in the United States are now required to c ~ n t a i n d d i f v e that will help ~ s ?revent deposits from forming iny o u erz.gineand fuel system, allowing your emission control system to function properly. Therefore, you s h d d sot have to add anything to the fuel,. In addition, gasdines containir,g oxygenates, such as ethers and ethanol, and reformulated gasolines may be available in your area to help clean the air. General Motors recommends that you use these gasolines if they comply with the specifications described edier.