Correct spark plug set
Copper or Platinum plugs for Subaru Loyale.
Typical quantity is 4-8 (varies by engine) and common gap spec is 0.028" - 0.044".
Check Price and Fitment⚡Spark Plug Type
Subaru Loyale Spark Plug Type
Find the correct spark plug type, gap size, and replacement interval for your Subaru Loyale. Covers all model years with torque specs.
Last updated: 2026-05-07 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
The Subaru Loyale 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.
| Generation | Years | Top spec |
|---|---|---|
| 1989-1994 | 1989-1994 | Copper or Platinum |
| 1988-1988 | 1988-1988 | Copper or Platinum |
Factory Manual ConfirmationSpark Plug Type
Know the exact spark plug type job for your Subaru Loyale
The Subaru Loyale 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.
Spark plug type and gap depend on the exact engine. Confirm the engine code before buying plugs or setting the gap. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.
Exact Vehicle Check
Use the archive navigator when you need the exact engine, trim, or production-branch manual instead of a broad year-range summary. That keeps the buying list and repair steps aligned with the real vehicle.
Open the manual links above to confirm the exact engine and trim branch before ordering parts.
1989-1994
1989-1994Spark 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)
1988-1988
1988-1988Spark 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)
Ready to BuyFitment-first picks for Subaru Loyale
Buy the Exact Parts and Tools for This Job
These links are built from the same specs shown on this page so users can move from lookup to purchase faster. Confirm exact engine and trim if your vehicle has multiple variants, then build the full cart before you step away from the computer.
Affiliate disclosure: We may earn a commission at no extra cost to you. The goal is to get you to the right parts in one pass.
Spec Snapshot
- Spark Plug Type
- Copper or Platinum
- Plug Gap
- 0.028" - 0.044" (0.7 - 1.1mm)
- Replacement Interval
- 30,000 miles
Spark plug socket set
Magnetic or rubber-insert sockets for safe plug installation.
Prevents cracked insulators and dropped plugs in deep wells.
Check Price and Fitment3/8-inch torque wrench
Torque to spec and avoid stripping aluminum threads.
Plug thread damage is expensive and fully avoidable.
Check Price and FitmentGap gauge and anti-seize kit
Helpful for checking plug gap and protecting service threads.
Small install tools prevent big ignition problems later.
Check Price and FitmentDielectric grease and coil boots
Protect connectors and coil boots during plug service.
Moisture protection helps prevent repeat misfires and corrosion.
Check Price and FitmentBefore you buy, sanity-check the repair quote and the cart
If your shop quote looks high, run it through Quote Shield to catch overpricing before checkout. Then use the parts links above to lock in the one-trip plan.
One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
⚡Shop →
Iridium Spark Plugs
Long-lasting performance plugs for modern engines.
🔌Shop →
Spark Plug Socket
Magnetic or rubber-insert socket to prevent damage.
📏Shop →
Gap Gauge
Ensure your plugs are set to the exact factory spec.
🔧Shop →
Torque Wrench
Crucial for tightening plugs without stripping threads.
🧴Shop →
Anti-Seize Lubricant
Prevents plugs from welding to the cylinder head.
🧪Shop →
Dielectric Grease
Protects ignition boots and connectors from moisture.
🧰View All →
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your Subaru Loyale so the job is ready when the parts arrive.
Frequently Asked Questions
- What spark plugs does a Subaru Loyale use?
- The Subaru Loyale 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 Subaru Loyale?
- Modern Subaru Loyale 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 Subaru Loyale?
- Most Subaru Loyale 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 Subaru Loyale?
- 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.
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Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-07