Best Spark Plugs for Cadillac: Escalade, CT5, and More

Cadillac builds some of GM's finest vehicles — from the powerful Escalade to the refined CT5. Their engines deserve OEM-quality spark plugs to maintain the performance and smoothness that Cadillac owners expect.

6.2L V8 (Escalade, CT6 V)

The 6.2L V8 is GM's top naturally aspirated engine. ACDelco Professional Iridium plugs are the OEM specification. These plugs support the engine's 420 hp output and extended 100,000-mile service interval.

3.0L Turbocharged Inline-6 (CT5, CT4)

Cadillac's inline-6 turbo is a refined, powerful engine. ACDelco iridium plugs engineered for this application maintain the smooth, linear power delivery that distinguishes this engine.

4.2L Twin-Turbo V8 (CT6 Blackwing)

The hand-built Blackwing V8 is a masterpiece of engineering. ACDelco OEM-spec iridium plugs are the only appropriate choice for this engine. Do not deviate from OEM specification on a $300,000 vehicle's engine.

Escalade Specific Notes

The Escalade 6.2L with Active Fuel Management (cylinder deactivation) is particularly sensitive to plug condition. Inspect plugs at 60,000 miles even if rated for longer — AFM engines can build deposits on deactivated cylinder plugs faster than normal engines.

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