2003 Chevrolet Monte Carlo Owner's Manual - Page 254
2003 Chevrolet Monte Carlo Manual
Page 254 highlights
As in the chart shown previously, if you have the 3400 V6 engine, SAE 5W-30 is the only viscosity grade recommended for your vehicle. You should look for and use only oils which have the API Starburst symbol and which are also identified as SA€ 5W-30. If you cannot find such SAE 5W-30 oils, you can use an SAE 1OW-30 oil which has the API Starburst symbol, if it's going to be 0°F (-18°C) or above. Do not use other viscosity grade oils, such as SA€ IOW-40 or SAE 20W-50 under anyconditions. As shown in the following chart, if you have the 3800 V6 engine, SA€ 1OW-30 is the viscosity grade recommended for your vehicle. However, you can use SAE 5W-30 if it's going to be colder than 60°F (16°C) before your next oil change. When it's very cold, colder than 0°F (-18"C), you should use an SAE 5W-30 oil. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity grade oils, such as S A E IOW-40 or SAE 2OW-50 under any conditions. RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS ~ ~ ~ ~ -~ FOR BESTFUELECONOMYANDCOLDSTARTING,SELECTTHE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. ~. ~ .~ ~~ HOT WEATHER c $' F + 100- + 601 *801 t 1 40 + 20 0- I I I I- SAE 1DW-30 PREFERRED above 0°F (-l WC) WEATHER SAE 5W-30 - DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED L 3800 (Code K) V6 Engine 5-19