NGK Iridium spark plugs last forever

[Constant Mesh]

Just installed a new set in my 105K mile Honda auto. After 105K the originals still looked quite serviceable. These plugs have amazing longevity.

 

[Patriot]

+1

 

[Big Shasta]

Good to hear, I just bought a set for my FJR

 

[bikerskier]

Likewise, just over $7 each at Rock Auto, plus $4 bucks shipping. arrived in 2 days.

 

[smokeFJR06]

Just installed a new set in my 105K mile Honda auto. After 105K the originals still looked quite serviceable. These plugs have amazing longevity.

So, you're saying they don't need to be replaced every 16,000 miles like the owners manual says?

Sorry, just re-read and saw you're talking about your car! My bad! I got excited there. Time to change my plugs (Iridiums).

 

[C&C]

Just installed a new set in my 105K mile Honda auto. After 105K the originals still looked quite serviceable. These plugs have amazing longevity.

So, you're saying they don't need to be replaced every 16,000 miles like the owners manual says?

Sorry, just re-read and saw you're talking about your car! My bad! I got excited there. Time to change my plugs (Iridiums).

They probably don't. If you keep you fuel mileage records, and your mpg doesn't go down, you probably don't need to change your plugs.

 

[Constant Mesh]

Obviously there's no issue about plug threads being locked in or frozen if the plugs aren't removed periodically. After six years and 105K miles the plugs came out very easily. They were still tight but they broke loose easily.

They were also very clean with very little combustion build-up. Much, much cleaner than the ones I removed from my FJR after only 16K miles. Obviously the fueling/combustion process is much better controlled in the auto engine. Maybe the I-VTEC valve control system has many benefits. I routinely get 38+ MPG with this four cylinder car.

 

[Patriot]

Obviously there's no issue about plug threads being locked in or frozen if the plugs aren't removed periodically. After six years and 105K miles the plugs came out very easily. They were still tight but they broke loose easily.
They were also very clean with very little combustion build-up. Much, much cleaner than the ones I removed from my FJR after only 16K miles. Obviously the fueling/combustion process is much better controlled in the auto engine. Maybe the I-VTEC valve control system has many benefits. I routinely get 38+ MPG with this four cylinder car.

I and many recommend "never seize" on plugs' threads and some dielectric (silicon) grease inside the boots to make removal down the road safe and easy