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1985 Isuzu I-Mark Oil Capacity, Types, & Filters

Your ultimate DIY maintenance guide for the 1985 Isuzu I-Mark oil change is here! No more searching – find all the critical oil specs for your 1985 Isuzu I-Mark, including exact engine oil capacity, the manufacturer recommended oil viscosity and type, and the correct OEM and aftermarket oil filters.

We cover all available engine options categorized by their specific engine codes, ensuring you get pinpoint accuracy for your specific vehicle configuration. Keep reading to discover everything required for a successful 1985 Isuzu I-Mark oil change!

Scroll Table ➜

Engine & CodeOil CapacityOil Viscosity/TypeOil Filter
1.5L 4-cylinder [K] K3.3 quarts (with filter)10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)		Isuzu 8944570340
Isuzu 8944567412
1.8L 4-cylinder [B] B3.8 quarts (with filter)10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)		Isuzu 8944567412

Select Your 1985 Isuzu I-Mark Engine Option

1.5L 4-cylinder Engine Code [K] K

Engine:

1.5L 4-cylinder [K] K [aka 1.5L L4 (Gas)]

Body & Trims:

Base, DLX

Oil Capacity:

3.3 quarts (with filter)

Oil Viscosity/Type:

10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)

OEM Oil Filter:

Isuzu 8944570340 and Isuzu 8944567412

Oil Filter Replaces:

8941515272 and 8941357471, 8941494180, 8942019422, 8942019423, 8942435020, 8942435021, 8942511101, 8944110840, 8944304111, 8944304112, 8944567410, 8944567411

1985 Isuzu I-Mark 1.5L 4-cylinder [K] K oil change details

Oil Grade:

SJ

Oil Capacity:

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

Oil Viscosity/Type:

10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

51334-EA

Wix Air Filter:

N/A

Coolant Capacity:

6.9 quarts

Oil Drain Plug Torque:

N/A

Notes:

N/A

How much oil does the 1985 Isuzu I-Mark 1.5L 4-cylinder ([K] K) take?

A complete oil change for the 1985 Isuzu I-Mark 1.5L 4-cylinder (with engine code [K] K) requires 3.3 quarts (with filter) of engine oil. To ensure safety and performance, always verify the level on the dipstick after refilling.

What type of oil is recommended for the 1985 Isuzu I-Mark 1.5L 4-cylinder ([K] K)?

For optimal engine longevity, the manufacturer recommended motor oil for the 1985 Isuzu I-Mark 1.5L 4-cylinder is using:

10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)

Ensure the oil you choose meets the SJ standard.

What is the best oil filter for the 1985 Isuzu I-Mark 1.5L 4-cylinder ([K] K)?

The factory-recommended OEM oil filter for the 1985 Isuzu I-Mark 1.5L 4-cylinder is the Isuzu 8944570340 or Isuzu 8944567412. If you prefer a top-tier aftermarket option, the Wix 51334-EA is an excellent choice.

What is the oil drain plug torque spec for the 1985 Isuzu I-Mark 1.5L 4-cylinder ([K] K)?

To prevent leaks or stripped oil pan threads, the drain plug on the 1985 Isuzu I-Mark 1.5L 4-cylinder should be tightened to exactly the factory specified ft-lbs and we also recommend installing a new crush washer with every oil change.

What is the correct air filter for the 1985 Isuzu I-Mark 1.5L 4-cylinder ([K] K)?

For optimal engine performance and clean airflow, the recommended engine air filter replacement for the 1985 Isuzu I-Mark 1.5L 4-cylinder is the Wix or other equivalent found in air filter cross-reference catalog for this trim compatible with your intake system. It is a good maintenance habit to inspect this filter during every oil change.

What is the coolant capacity for the 1985 Isuzu I-Mark 1.5L 4-cylinder ([K] K)?

The total engine coolant (antifreeze) capacity for the 1985 Isuzu I-Mark 1.5L 4-cylinder is:

6.9 quarts

Always ensure you use the manufacturer-approved coolant color and type to prevent internal corrosion.

1.8L 4-cylinder Engine Code [B] B

Engine:

1.8L 4-cylinder [B] B [aka 1.8L L4 (Gas)]

Body & Trims:

Base, DLX

Oil Capacity:

3.8 quarts (with filter)

Oil Viscosity/Type:

10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)

OEM Oil Filter:

Isuzu 8944567412

Oil Filter Replaces:

8941357471, 8941494180, 8942019422, 8942019423, 8942435020, 8942435021, 8942511101, 8944110840, 8944304111, 8944304112, 8944567410, 8944567411

1985 Isuzu I-Mark 1.8L 4-cylinder [B] B oil change details

Oil Grade:

SJ

Oil Capacity:

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

Oil Viscosity/Type:

10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)

Name of Oil Filter:

N/A

Wix Oil Filter:

51381-EA

Wix Air Filter:

N/A

Coolant Capacity:

6.9 quarts

Oil Drain Plug Torque:

N/A

Notes:

N/A

How much oil does the 1985 Isuzu I-Mark 1.8L 4-cylinder ([B] B) take?

A complete oil change for the 1985 Isuzu I-Mark 1.8L 4-cylinder (with engine code [B] B) requires 3.8 quarts (with filter) of engine oil. To ensure safety and performance, always verify the level on the dipstick after refilling.

What type of oil is recommended for the 1985 Isuzu I-Mark 1.8L 4-cylinder ([B] B)?

For optimal engine longevity, the manufacturer recommended motor oil for the 1985 Isuzu I-Mark 1.8L 4-cylinder is using:

10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)

Ensure the oil you choose meets the SJ standard.

What is the best oil filter for the 1985 Isuzu I-Mark 1.8L 4-cylinder ([B] B)?

The factory-recommended OEM oil filter for the 1985 Isuzu I-Mark 1.8L 4-cylinder is the Isuzu 8944567412. If you prefer a top-tier aftermarket option, the Wix 51381-EA is an excellent choice.

What is the oil drain plug torque spec for the 1985 Isuzu I-Mark 1.8L 4-cylinder ([B] B)?

To prevent leaks or stripped oil pan threads, the drain plug on the 1985 Isuzu I-Mark 1.8L 4-cylinder should be tightened to exactly the factory specified ft-lbs and we also recommend installing a new crush washer with every oil change.

What is the correct air filter for the 1985 Isuzu I-Mark 1.8L 4-cylinder ([B] B)?

For optimal engine performance and clean airflow, the recommended engine air filter replacement for the 1985 Isuzu I-Mark 1.8L 4-cylinder is the Wix or other equivalent found in air filter cross-reference catalog for this trim compatible with your intake system. It is a good maintenance habit to inspect this filter during every oil change.

What is the coolant capacity for the 1985 Isuzu I-Mark 1.8L 4-cylinder ([B] B)?

The total engine coolant (antifreeze) capacity for the 1985 Isuzu I-Mark 1.8L 4-cylinder is:

6.9 quarts

Always ensure you use the manufacturer-approved coolant color and type to prevent internal corrosion.

People also ask – 1985 Isuzu I-Mark

What is the oil capacity of a 1985 Isuzu I-Mark?

Depending on the specific engine option, the 1985 Isuzu I-Mark oil capacity ranges from 3.3 to 3.8 quarts. Here is the exact oil capacity breakdown for each available engine configuration:

• 1.5L 4-cylinder ([K] K): 3.3 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.
• 1.8L 4-cylinder ([B] B): 3.8 quarts. (with filter). This is the capacity with the oil filter installed. Always check the oil level after refilling.

Always check your dipstick after refilling to ensure the proper level.

What type of oil does a 1985 Isuzu I-Mark use?

Across its 2 available engine configurations, the 1985 Isuzu I-Mark uses the following motor oil viscosities: 10W (-18 To 15°C)SAE 10W-30 (Above -18°C)SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C) 30 (Above 5°C)SAE 5W-20 (Below -7°C)SAE 5W-30 (Below 15°C). Using the correct manufacturer-approved oil weight is crucial for engine health. Here are the specific oil type requirements by engine:

• 1.5L 4-cylinder ([K] K):
Grade: SJ
10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)

• 1.8L 4-cylinder ([B] B):
Grade: SJ
10W (-18 To 15°C)
SAE 10W-30 (Above -18°C)
SAE 20W-20, SAE 20W-40, SAE 20W-50 (Above -7°C)
30 (Above 5°C)
SAE 5W-20 (Below -7°C)
SAE 5W-30 (Below 15°C)

What is the best oil filter for the 1985 Isuzu I-Mark?

The proper oil filter depends on your exact engine code. The 1985 Isuzu I-Mark utilizes the following premium aftermarket Wix oil filters across its lineup: 51334-EA and 51381-EA. Here is the specific OEM and aftermarket filter data for each engine:

• 1.5L 4-cylinder ([K] K):
OEM Filter: Isuzu 8944570340 or Isuzu 8944567412
Wix Filter: 51334-EA

• 1.8L 4-cylinder ([B] B):
OEM Filter: Isuzu 8944567412
Wix Filter: 51381-EA

How often should I change the oil in my 1985 Isuzu I-Mark?

For modern models running full synthetic oil, oil change intervals are typically every 7,500 to 10,000 miles. However, for older Isuzu I-Mark generations (1985-2010) or those using conventional/synthetic-blend fluid, changing the oil and filter every 3,000 to 5,000 miles is highly recommended to prevent sludge buildup. Regardless of engine (1.5L 4-cylinder and 1.8L 4-cylinder), you should change your oil at least once a year even if you don’t reach the mileage limit.

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