1994 Cadillac DeVille Owner's Manual - Page 275

You should also use the 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 I L SAE VISCOSITY GRADE O FOR THE EXPECTED TEMPERATURE RANGE. HOT WEATHER r 7 LOOK FOR ONE OF THESE LABELS .'F n \ 'C +loo - - . +80 +60 +40 t 38 t 27 --. f 16 - -.t4 - -.-7 - - ' +20 0 -18 SAE 1 o w - 3 ~ PREFERRED above 0°F / COLD WEATHER DO NOT USE SAE 1OW-40, SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED As shown in the chart,SAE 1OW-30 is best for your vehicle. However, you can use S A E 5W-30 if it's going to be colder than O F (16 C) 60 before your next oil change. When it's very cold, you should use SAE 5W-30. These numberson an oilcontainer show its viscosity, or thickness. Do not use other viscosity oils, suchas S A E 1OW-40or S A E 2OW-50. 262