1993 Pontiac Trans Sport Owner's Manual - Page 228
1993 Pontiac Trans Sport Manual
Page 228 highlights
Recommended SAE ViscosiQ Grade EngineOil? For best fuel economy and cold starting, select the lowestSAE viscosity grade oil fnr thn expectnrl tnmnnratl trnrannn 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 letters show American of Petroleum Institute (API) levels quality. IF NEITHER SAE 5W-30 NOR SAE 1OW-30 GRADE OILS ARE AVAILABLE, SAE 30 GRADE MAY BE USED AT TEMPERATURta ABOVE 40 DEGREES F (4 DEGREES C). DO NOT USE SAE 1OW-40, SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED. SAE 5W-30 (3.mV6 Engine) As shown in the viscosity chart, SAE 5W-30 is best for your vehicle. However, you can use SAE 1OW-30 if it's going to be 0"F (-18"C) or above. oil These numbers on an container show its viscosity,or thickness. Do not use other viscosity such as oils SAE 1OW-40 or SAE 20W-50, 227 ..
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