1983 Buick Skylark Oil Type & Capacity

It depends on the engine: Base, 2D Coupe, 2.5 R, Automatic uses 5W-30; Base, 2D Coupe, 2.5 R, Standard uses 5W-30; Base, 2D Coupe, 2.8 X, Automatic uses 5W-30; Base, 2D Coupe, 2.8 X, Standard uses 5W-30; Base, 4D Sedan, 2.5 R, Automatic uses 5W-30; Base, 4D Sedan, 2.5 R, Standard uses 5W-30; Base, 4D Sedan, 2.8 X, Automatic uses 5W-30; Base, 4D Sedan, 2.8 X, Standard uses 5W-30; Custom, 2D Coupe, 2.5 R, Automatic uses 5W-30; Custom, 2D Coupe, 2.5 R, Standard uses 5W-30; Custom, 2D Coupe, 2.8 X, Automatic uses 5W-30; Custom, 2D Coupe, 2.8 X, Standard uses 5W-30; Custom, 2D Coupe, 2.8 Z, Automatic uses 5W-30; Custom, 2D Coupe, 2.8 Z, Standard uses 5W-30; Custom, 4D Sedan, 2.5 R, Automatic uses 5W-30; Custom, 4D Sedan, 2.5 R, Standard uses 5W-30; Custom, 4D Sedan, 2.8 X, Automatic uses 5W-30; Custom, 4D Sedan, 2.8 X, Standard uses 5W-30; Custom, 4D Sedan, 2.8 Z, Automatic uses 5W-30; Custom, 4D Sedan, 2.8 Z, Standard uses 5W-30; Limited, 2D Coupe, 2.5 R, Automatic uses 5W-30; Limited, 2D Coupe, 2.5 R, Standard uses 5W-30; Limited, 2D Coupe, 2.8 X, Automatic uses 5W-30; Limited, 2D Coupe, 2.8 X, Standard uses 5W-30; Limited, 2D Coupe, 2.8 Z, Automatic uses 5W-30; Limited, 2D Coupe, 2.8 Z, Standard uses 5W-30; Limited, 4D Sedan, 2.5 R, Automatic uses 5W-30; Limited, 4D Sedan, 2.5 R, Standard uses 5W-30; Limited, 4D Sedan, 2.8 X, Automatic uses 5W-30; Limited, 4D Sedan, 2.8 X, Standard uses 5W-30; Limited, 4D Sedan, 2.8 Z, Automatic uses 5W-30; Limited, 4D Sedan, 2.8 Z, Standard uses 5W-30; T-Type, Automatic uses 5W-30; T-Type, Standard uses 5W-30.

Oil capacity depends on the engine: Base, 2D Coupe, 2.5 R, Automatic holds 3.0 quarts with filter; Base, 2D Coupe, 2.5 R, Standard holds 3.0 quarts with filter; Base, 2D Coupe, 2.8 X, Automatic holds 4.0 quarts with filter; Base, 2D Coupe, 2.8 X, Standard holds 4.0 quarts with filter; Base, 4D Sedan, 2.5 R, Automatic holds 3.0 quarts with filter; Base, 4D Sedan, 2.5 R, Standard holds 3.0 quarts with filter; Base, 4D Sedan, 2.8 X, Automatic holds 4.0 quarts with filter; Base, 4D Sedan, 2.8 X, Standard holds 4.0 quarts with filter; Custom, 2D Coupe, 2.5 R, Automatic holds 3.0 quarts with filter; Custom, 2D Coupe, 2.5 R, Standard holds 3.0 quarts with filter; Custom, 2D Coupe, 2.8 X, Automatic holds 4.0 quarts with filter; Custom, 2D Coupe, 2.8 X, Standard holds 4.0 quarts with filter; Custom, 2D Coupe, 2.8 Z, Automatic holds 4.0 quarts with filter; Custom, 2D Coupe, 2.8 Z, Standard holds 4.0 quarts with filter; Custom, 4D Sedan, 2.5 R, Automatic holds 3.0 quarts with filter; Custom, 4D Sedan, 2.5 R, Standard holds 3.0 quarts with filter; Custom, 4D Sedan, 2.8 X, Automatic holds 4.0 quarts with filter; Custom, 4D Sedan, 2.8 X, Standard holds 4.0 quarts with filter; Custom, 4D Sedan, 2.8 Z, Automatic holds 4.0 quarts with filter; Custom, 4D Sedan, 2.8 Z, Standard holds 4.0 quarts with filter; Limited, 2D Coupe, 2.5 R, Automatic holds 3.0 quarts with filter; Limited, 2D Coupe, 2.5 R, Standard holds 3.0 quarts with filter; Limited, 2D Coupe, 2.8 X, Automatic holds 4.0 quarts with filter; Limited, 2D Coupe, 2.8 X, Standard holds 4.0 quarts with filter; Limited, 2D Coupe, 2.8 Z, Automatic holds 4.0 quarts with filter; Limited, 2D Coupe, 2.8 Z, Standard holds 4.0 quarts with filter; Limited, 4D Sedan, 2.5 R, Automatic holds 3.0 quarts with filter; Limited, 4D Sedan, 2.5 R, Standard holds 3.0 quarts with filter; Limited, 4D Sedan, 2.8 X, Automatic holds 4.0 quarts with filter; Limited, 4D Sedan, 2.8 X, Standard holds 4.0 quarts with filter; Limited, 4D Sedan, 2.8 Z, Automatic holds 4.0 quarts with filter; Limited, 4D Sedan, 2.8 Z, Standard holds 4.0 quarts with filter; T-Type, Automatic holds 4.0 quarts with filter; T-Type, Standard holds 4.0 quarts with filter.

Most 1983 Buick Skylark owners follow a 5,000–7,500 mile interval with conventional oil, or up to 10,000 miles with full synthetic. Always check the oil life monitor if equipped, and consult your owner's manual — Buick recommends intervals based on driving conditions, not just mileage.

Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1983 Buick Skylark. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.