1993 Buick Riviera Owner's Manual - Page 228

RECOMMENDED SAE VISCOSITY BRADE ENGINE: OILS FOR BEST FUEL ECONOMY AND COW STARTlW6, SELECT THE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. ' S A E 1OW-30 As shown in the viscosity chart,S A E 1OW-30 is best for your vehicle. However, you can use SAE5W-30 if it's going to be colder than O F (16 C) before 60 your next oil change. When it's very cold, below O*F (-18*C), you should use SAE 5W-30. HOT WEATHER r 7 LOOK FOR THIS LABEL "F -100 ' I "C +3a $ +; These an @ ' J numbers onuse oil container show its viscosity, or other viscosity oils such SAE as thickness. Do not 1OW-40 or SAE 20W-50. 0 Energy Conserving I1 Oils with these words on container will help you the save fuel. This doughnut-shaped logo (symbol) is used on most oil containers to help you select the correct oil. You should look for this on the oil container, use and only those oils that display the logo. GM Goodwrench@oil (in Canada, GM Engine Oil) meets all the requirements for your vehicle. Engine Oil Additives:Don't add anything to your oil. if Your Buick dealer is ready to advise you think something should be added. +a0 +60 +40 ' . +27 ,+16 +4 +20 ' -7 - 18 --10W.30 SAE PREFERRED above 0°F (-18°C) T. 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 DEGREESC). DO NOT USE SAE 1OW-40, SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED WEATHER 226