Engine Oil - Recommendations

Number 83-I-30 Section 6B Date 01/83
Subject: ENGINE OIL RECOMMENDATIONS - 1980 THROUGH 1983 PONTIAC DIESEL ENGINES
The best lubricating oil you can use in Pontiac diesel engines is SAE 30 SF/CD; however, SAE 30 SF/CC quality is acceptable. These oils combine excellent film strength with the best available additive package to prevent wear and protect against piston ring sticking at higher mileages. DO NOT USE SAE 10W-40 oils in Pontiac diesel engines because most of them can cause piston ring sticking and engine damage.



SAE 30 SF/CD and SF/CC oils are generally not suitable when temperatures fall below 32~F because of cold starting considerations. The use of SAE 15W-40 SF/CD or SF/CC at these lower temperatures (and in extremely cold areas SAE 10W-30 SF/CD or SF/CC), may be necessary. Study the following chart carefully and follow its recommendations... As always, NEVER exceed the recommended oil change intervals since oil quality can deteriorate rapidly with mileage, as carbon accumulates in the oil.