What spark plugs does a Porsche 928 use?

The Porsche 928 spark plug type varies by year and engine. Newer models (2010+) typically use iridium plugs for longer service life. Older models may use platinum or copper. Check the specs below for your exact year.

How often should I change spark plugs on a Porsche 928?

Modern Porsche 928 models with iridium plugs can go 60,000-100,000 miles between changes. Older models with copper plugs need replacement every 30,000 miles. Replace sooner if you notice misfires, rough idle, or poor fuel economy.

What is the spark plug gap for a Porsche 928?

Most Porsche 928 models use a spark plug gap between 0.039" and 0.044" (1.0-1.1mm). Pre-gapped plugs from the OEM are recommended. Do not re-gap iridium-tip plugs as it can damage the electrode.

Can I upgrade to iridium spark plugs in my Porsche 928?

Yes, upgrading from copper or platinum to iridium is generally safe and beneficial. Iridium plugs offer better ignitability, longer life, and improved fuel economy. Just match the correct heat range and gap for your engine.

⚡Spark Plug Type

Porsche 928 Spark Plug Type

Find the correct spark plug type, gap size, and replacement interval for your Porsche 928. Covers all model years with torque specs.

Quick Answer

The Porsche 928 typically uses iridium or platinum spark plugs. Newer models (2010+) use long-life iridium plugs rated for 60,000-100,000 miles. Check below for your specific year.

1990-1995

Spark Plug TypeCopper or Platinum

Plug Gap0.028" - 0.044" (0.7 - 1.1mm)

Replacement Interval30,000 miles

Torque Spec13 - 18 ft-lbs

Quantity4-8 (varies by engine)

Notes

→Use a torque wrench — over-tightened plugs can strip aluminum heads
→Apply a thin coat of anti-seize to threads (unless plug is pre-coated)

Shop on Amazon →Full Repair Guide →

1984-1989

Spark Plug TypeCopper or Platinum

Plug Gap0.028" - 0.044" (0.7 - 1.1mm)

Replacement Interval30,000 miles

Torque Spec13 - 18 ft-lbs

Quantity4-8 (varies by engine)

Notes

→Use a torque wrench — over-tightened plugs can strip aluminum heads
→Apply a thin coat of anti-seize to threads (unless plug is pre-coated)

Shop on Amazon →Full Repair Guide →

1978-1983

Spark Plug TypeCopper or Platinum

Plug Gap0.028" - 0.044" (0.7 - 1.1mm)

Replacement Interval30,000 miles

Torque Spec13 - 18 ft-lbs

Quantity4-8 (varies by engine)

Notes

→Use a torque wrench — over-tightened plugs can strip aluminum heads
→Apply a thin coat of anti-seize to threads (unless plug is pre-coated)

Shop on Amazon →Full Repair Guide →

Frequently Asked Questions

What spark plugs does a Porsche 928 use?: The Porsche 928 spark plug type varies by year and engine. Newer models (2010+) typically use iridium plugs for longer service life. Older models may use platinum or copper. Check the specs below for your exact year.
How often should I change spark plugs on a Porsche 928?: Modern Porsche 928 models with iridium plugs can go 60,000-100,000 miles between changes. Older models with copper plugs need replacement every 30,000 miles. Replace sooner if you notice misfires, rough idle, or poor fuel economy.
What is the spark plug gap for a Porsche 928?: Most Porsche 928 models use a spark plug gap between 0.039" and 0.044" (1.0-1.1mm). Pre-gapped plugs from the OEM are recommended. Do not re-gap iridium-tip plugs as it can damage the electrode.
Can I upgrade to iridium spark plugs in my Porsche 928?: Yes, upgrading from copper or platinum to iridium is generally safe and beneficial. Iridium plugs offer better ignitability, longer life, and improved fuel economy. Just match the correct heat range and gap for your engine.

Porsche 928 Repair Guides

→Porsche 928 Spark Plug Replacement →Porsche 928 Ignition Coil Replacement →Porsche 928 Oxygen Sensor Replacement

Browse all Porsche guides →Browse all Porsche 928 guides →

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