How long do Mopar spark plugs last?
Most Mopar spark plugs are designed to last many miles. For most modern Mopar engines, long-life iridium or platinum plugs are typically rated around 60,000 to 100,000 miles, while copper-core plugs are commonly around 30,000 miles. Always verify the exact interval in your owner’s manual or with a Mopar dealer, as specifications can vary by model and year.
What determines spark plug life
Several factors influence how long a spark plug lasts in a Mopar engine, including the plug material, engine design, and how the vehicle is driven.
Plug type and recommended lifespans
- Copper plugs: commonly around 30,000 miles, and sometimes less in high-compression or high-heat engines.
- Platinum plugs: typically around 60,000 miles in many modern engines.
- Iridium or iridium-alloy plugs: often 100,000 miles or more, depending on engine and operating conditions.
Replacement intervals can vary by model year and engine, so confirm with your owner’s manual or Mopar dealer.
Other factors that can shorten or extend life
Beyond the plug material, operating conditions and maintenance practices can shorten or extend service life.
- Severe driving: frequent short trips, heavy towing, and lots of stop-and-go can wear plugs faster.
- Heat and deposits: excessive engine heat or fuel deposits can foul plugs and reduce life.
- Fuel quality and ignition health: poor fuel or failing ignition coils can accelerate wear.
- Proper gap and torque: using the correct spark plug gap and proper torque during installation helps longevity.
In harsh conditions, even long-life plugs may require replacement sooner than the nominal interval.
Maintenance tips to maximize life
Practical steps to maximize spark plug life.
- Stick to OEM-recommended plug type and replacement interval for your engine.
- Keep the ignition system in good condition; replace worn ignition coils if needed.
- Follow proper torque and gapping procedures during installation.
- Address misfires or warning lights promptly to avoid further damage.
Following these practices helps ensure the plugs reach or approach their rated life.
Summary
In short, Mopar spark plugs typically last about 60,000 to 100,000 miles for long-life iridium or platinum designs, with copper plugs around 30,000 miles. Always confirm the exact interval for your specific model, and adjust for harsh driving conditions. Regular inspection and proper installation help maximize life and reliability.
How long do RAM 1500 spark plugs last?
every 30,000 miles
Generally, it's advised to replace spark plugs every 30,000 miles, although this can vary based on your vehicle's usage and model year. Look out for these signs indicating a need for RAM 1500 spark plug replacement: Difficulty in starting your vehicle. Engine misfire.
How often should you change spark plugs in a 2015 5.7 Hemi?
If you drive a RAM 1500 with a 5.7L HEMI V8 engine built before 2014, you should replace the spark plugs every 30,000 miles. Newer models with the same engine can go up to 100,000 miles before needing a change.
Can spark plugs last 100,000 miles?
Less-expensive copper spark plugs have a relatively short lifespan and must be replaced every 30,000 miles or less, while pricier platinum or iridium spark plugs can last up to 100,000 miles.
How often should I change the spark plugs on my Jeep Grand Cherokee?
Spark plugs for a Jeep Grand Cherokee should be changed every 100,000 miles for most modern models with iridium or platinum plugs, but check your owner's manual for the specific recommendation. For older models or those with less durable plugs, the interval could be shorter, around 30,000 to 60,000 miles.
You can watch this video to learn how to replace spark plugs in a 2018 Jeep Grand Cherokee: 55sOutJeepingYouTube · Mar 13, 2023
General guidelines
- 100,000 miles: This is the typical replacement interval for Grand Cherokees equipped with long-life iridium or platinum spark plugs, which are common in newer models.
- 30,000–60,000 miles: This range is more common for older models or if they use less expensive copper plugs.
What to check for
- Consult your owner's manual: This is the most accurate source for your specific vehicle's maintenance schedule.
- Look for signs of wear: Symptoms of worn-out spark plugs include engine misfires, rough idling, poor fuel economy, and sluggish acceleration.
- Consider the type of plug: The lifespan of a spark plug depends on its material. Iridium and platinum plugs last much longer than copper plugs.
