1994 Cadillac Fleetwood Owner's Manual - Page 271

You should also usethe properviscosity oilfor your vehicle,as shown in the following chart: RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. . L . . HOP WEATHER 7 T LOOK FOR ONE OF THESE LABELS "F t 100 "C . t 38 t 27 t 16 +80 +SO. - +40 +20 - t4 -7 0- - 18 -- 5W-30 SAt PREFERRED SAE --. COLD WEATHER I- I NEITHER SAE 5W-30 NOR SAE 1OW-30 F GRADE OILS ARE AVAILABLE, SAE 30 GRADE MAY BE USED AT TEMPERATURES ABOVE 40 DEGREES F (4 DEGREES C). DO NOT USE SAE 1OW-40, SAE 20W-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED As shown inthe chart, S A E 5W-30 isbest for your vehicle. However, you can use S A E 1OW-30 if it's goingto be 0°F (-18OC) or above. These numbers on an oil container show its viscosity, thickness. Do not use or other viscosity oils, such as A E 1OW-40 or S A E 20W-50. S If you cannot find oils with new "starburst" symbol on the frontof the the container, you should look for and use oilscontaining the following three things: 258