Pronto PO85 Engine Oil Filter

Pronto PO85 Engine Oil Filter

The Pronto PO85 is a cartridge-style engine oil filter built with synthetic filter media and a rubber gasket for a precise seal. It is listed for a wide range of GM compact and midsize applications, including Buick Century, Buick Skylark, Chevrolet Celebrity, Chevrolet Lumina, Oldsmobile Cutlass Ciera, Oldsmobile Cutlass Cruiser, Oldsmobile Cutlass Calais, Pontiac 6000, Pontiac Grand Am, Pontiac Fiero, and Oldsmobile Calais.

Key Features

• Cartridge engine oil filter design
• Synthetic filter media for oil filtration
• 2.80 in. height
• Rubber gasket with 0.10 in. thickness
• Gasket inside diameter: 2.69 in.
• Outer diameter bottom: 2.83 in.
• Inner diameter bottom: 0.68 in.
• No anti-drain back valve

Product Details

Pronto Standard Life PO85 is an engine oil filter for vehicles that use a cartridge-format filter element. The synthetic media supports oil cleaning in the lubrication system, while the rubber gasket dimensions help provide a proper sealing surface during service. This part number, PO85, is cross-referenced with Premium Guard PG85 for the same application. It is listed for 1987-1992 Buick Century, 1987-1991 Buick Skylark, 1988-1990 Chevrolet Celebrity, 1990-1992 Chevrolet Lumina, 1987 Oldsmobile Calais, 1988-1992 Oldsmobile Cutlass Ciera, 1988-1992 Oldsmobile Cutlass Cruiser, 1988-1991 Oldsmobile Cutlass Calais, 1988-1988 Pontiac Fiero, 1988-1991 Pontiac 6000, and 1987-1991 Pontiac Grand Am.

Common Issues This Filter Can Address

• Replacing a worn or clogged cartridge oil filter
• Restoring proper oil filtration during routine maintenance
• Correcting a filter service interval on GM applications that use this size and style
• Replacing a filter with a damaged or flattened gasket seal
• Matching the specified filter format for listed Buick, Chevrolet, Oldsmobile, and Pontiac models

Installation Notes and Tips

Verify the cartridge style, dimensions, and gasket measurements before installation. Clean the filter housing thoroughly, inspect the sealing surfaces, and confirm the gasket seats evenly before closing the housing. Because this filter does not include an anti-drain back valve, follow the vehicle service procedure for the listed application and check oil level after startup. Fits 1987-1992 Buick Century, 1987-1991 Buick Skylark, 1988-1990 Chevrolet Celebrity, 1990-1992 Chevrolet Lumina, 1987 Oldsmobile Calais, 1988-1992 Oldsmobile Cutlass Ciera, 1988-1992 Oldsmobile Cutlass Cruiser, 1988-1991 Oldsmobile Cutlass Calais, 1988 Pontiac Fiero, 1988-1991 Pontiac 6000, and 1987-1991 Pontiac Grand Am.

Quality Assurance

Pronto Standard Life identifies this filter as part of the brand’s standard replacement line for routine service applications. Confirm fitment by year, make, model, and filter style before purchase.