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1985 Oldsmobile Firenza Oil Capacity, Types, & Filters

Your essential guide to 1985 Oldsmobile Firenza oil change is here! No more searching – find all the critical oil specs for your 1985 Oldsmobile Firenza, including oil capacity, recommended oil viscosity (type), and the correct oil filter.

We cover all engine options, categorized by their specific engine codes, ensuring you get the right information for your specific configuration. Keep reading to discover everything you need for your next 1985 Oldsmobile Firenza oil change!

Scroll Table ➜

Engine & CodeOil CapacityOil Viscosity/TypeOil Filter
2.0L 4-cylinder [P] P4.5 quarts (with filter)SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)
GM 12737090
1.8L 4-cylinder [0] O4 quarts (with filter)SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)
N/A
2.8L 6-cylinder [W] W4.5 quarts (with filter)SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)
N/A

Select Your 1985 Oldsmobile Firenza Engine Option

2.0L 4-cylinder Engine Code [P] P

Engine:

2.0L 4-cylinder [P] P [aka 2.0L L4 (Gas)]

Body & Trims:

Base, Brougham LX, Brougham SX, Cruiser LX, Cruiser SX, ES, GT

Oil Capacity:

4.5 quarts (with filter)

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)

OEM Oil Filter:

GM 12737090

Oil Filter Replaces:

19210286, 25171377

1985 Oldsmobile Firenza 2.0L 4-cylinder [P] P oil change details

Oil Grade:

API*

Oil Capacity:

4.5 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

51036-EA

Wix Air Filter:

N/A

Coolant Capacity:

9.5 quarts - For models WithOut Air Conditioning (AC).
10 quarts - For models with Air Conditioning (AC).

Oil Drain Plug Torque:

33 ft/lbs (Oil Drain Plug)

Notes:

N/A

1.8L 4-cylinder Engine Code [0] O

Engine:

1.8L 4-cylinder [0] O [aka 1.8L 4-cylinder]

Body & Trims:

All

Oil Capacity:

4 quarts (with filter)

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)

OEM Oil Filter:

N/A

Oil Filter Replaces:

N/A

1985 Oldsmobile Firenza 1.8L 4-cylinder [0] O oil change details

Oil Grade:

API*

Oil Capacity:

4 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

51040-EA

Wix Air Filter:

N/A

Coolant Capacity:

7.9 quarts

Oil Drain Plug Torque:

33 ft/lbs (Oil Drain Plug)

Notes:

N/A

2.8L 6-cylinder Engine Code [W] W

Engine:

2.8L 6-cylinder [W] W [aka 2.8L 6-cylinder]

Body & Trims:

All

Oil Capacity:

4.5 quarts (with filter)

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)

OEM Oil Filter:

N/A

Oil Filter Replaces:

N/A

1985 Oldsmobile Firenza 2.8L 6-cylinder [W] W oil change details

Oil Grade:

API*

Oil Capacity:

4.5 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.

Oil Viscosity/Type:

SAE 10W-30 (Above -18°C)
SAE 15W-40 (Above -12°C)
SAE 20W-20 (Above -7°C)
30 (Above 4°C)
SAE 5W-30 (16 To 38°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

51040-EA

Wix Air Filter:

N/A

Coolant Capacity:

11.1 quarts - For models with Air Conditioning (AC).
10.6 quarts - For models WithOut Air Conditioning (AC).

Oil Drain Plug Torque:

N/A

Notes:

N/A

Oldsmobile Firenza – Engine Oil details by Year