The best spark plugs for a 2020 Ram 1500 are OEM-equivalent iridium or platinum plugs from reputable brands (NGK, Denso, Mopar/Champion) selected to match your engine: either the 5.7L Hemi or the 3.6L Pentastar with eTorque.
In 2020 Ram 1500 pickups, two engines were common: the 5.7-liter Hemi V8 and the 3.6-liter Pentastar V6 with mild-hybrid eTorque. Spark plug choices hinge on the exact motor and the factory specifications. Premium iridium or platinum plugs tend to offer longer life and more stable ignition, but you should always confirm the exact heat range, threading, and gap from your owner's manual or a trusted parts supplier for your VIN.
Best spark plugs for the 5.7L Hemi
These options are widely recommended for the 5.7L Hemi because they balance longevity, reliability, and compatibility with the engine’s ignition system, including when towing or running under heavy load.
- NGK Iridium IX spark plugs
- Denso Iridium Power spark plugs
- Mopar/OEM-equivalent platinum spark plugs (factory spec replacements)
Iridium and OEM-equivalent platinum plugs deliver strong endurance and dependable ignition for the 5.7L Hemi, helping maintain smooth idle and fuel economy under typical and demanding driving conditions. Always ensure the plug type, heat range, and gap align with FCA’s specifications for your particular vehicle.
Best spark plugs for the 3.6L Pentastar eTorque
For the 3.6L Pentastar with eTorque, similar premium plugs are recommended, with emphasis on meeting the engine’s heat range and threading requirements as specified by FCA. Choosing OEM-equivalent parts helps preserve emissions performance and driveability.
- NGK Iridium IX spark plugs
- Denso Iridium Power spark plugs
- Mopar/OEM-equivalent platinum spark plugs (factory spec replacements)
Premium iridium or OEM-equivalent platinum plugs are favored for the 3.6L because they offer longevity and stable ignition in a modern, electronically controlled engine. Verify the exact heat range and reach for your VIN to ensure compatibility.
Maintenance tips and installation basics
Choosing the right plug and installation considerations
To maximize performance and preserve warranty coverage, use plugs that match the vehicle’s original specifications. When replacing, follow the service manual for gap settings, torque, and installation sequence. If you tow frequently or drive in extreme conditions, higher-grade iridium plugs can provide noticeable benefits in longevity and reliability.
Always inspect and replace the ignition wires/coil packs if needed, and use proper anti-seize and anti-corrosion practices as recommended by the manufacturer. If you’re unsure about the exact part number for your VIN, consult a dealership or trusted parts supplier to confirm OEM-equivalent options for your engine variant.
Summary
For a 2020 Ram 1500, the most reliable approach is to choose OEM-equivalent iridium or platinum spark plugs from NGK, Denso, or Mopar/Champion that match your exact engine (5.7L Hemi or 3.6L Pentastar eTorque). Adhering to the factory specifications for heat range, gap, and torque ensures optimal ignition, fuel economy, and emission compliance. When in doubt, verify with your owner’s manual or a trusted dealer to confirm the correct part for your VIN.