1993 Oldsmobile Achieva Owner's Manual - Page 224

Service & Appearance Care g& z g s >g & && @$ g&commended SAE Viscosity Grade Engine Oils . . For best fuel economy and cold starting, select the lowest viscosity grade oil SAE for the r-ected temwaturerancle. HOT UEATHER What Kind of Oil to Use Look for Three Things: SG "SG" must be on the oil container, either by itself or combined with other quality designations, such as "SGICC," "SGICD," "SF, SG, CC," etc. These lettersshow American Petroleum Institute (API) levelsof quality. COLD WEATHER IF NEITHER SAE 5W-30 NOR SAE 1OW-30 GRADE OILS ARE AVAILABLE, SAE 30 GRADE MAY BE USED AT TEMPERATURES ABOVE 40 DEGREES F (4 DEGREES C). SAE 5W-30 (2.3L Quad OHC and Quad 4 Engines) As shown in the viscosity chart,SAE 5W-30 is best for your vehicle. However, you can use SAE 1OW-30 if it's goingto be 0"F (-18"C) or above. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 1OW-40 or SAE 20W-50. I ;: ; 3 If youuse oils that don't have the 2% G" designation, you cancause ngine damage not coveredby your I :e:: -92 '- DO NOT USE SAE 1OW-40, SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED. 222