Spark Plug 101 [Archive]

1st

09-25-2010, 09:50 PM

On a n/a motor k20a3 Honda manual recommends to change the factory spark plugs at 110,000 miles. My question is after doing so how many miles can you put on a new plug before changing them out again? New plugs are denso ik20 Iridium Power if that make a difference thanks.

talonXracer

09-26-2010, 06:18 AM

The Denzo IK series of plugs have a seriously shorter life span, most will get about 30K miles on them before they are worn out.

1st

09-26-2010, 10:19 PM

What is your feed back on the Iridium Long Life plug part# SKJ20DR-M11. What do you sugjest as far as high milage goes for a plug?
Any idea what the factory plugs are? platnium?

revned3182

11-02-2010, 03:30 PM

http://farm2.static.flickr.com/1390/5132379642_877084be34_b.jpg

revned3182

11-02-2010, 03:31 PM

What is your feed back on the Iridium Long Life plug part# SKJ20DR-M11. What do you sugjest as far as high milage goes for a plug?
Any idea what the factory plugs are? platnium?
- iridium

yyi

11-02-2010, 04:15 PM

The Denzo IK series of plugs have a seriously shorter life span, most will get about 30K miles on them before they are worn out.

WHAT?! Only 30k? Damnit now i regret replacing mine with the IK20's. Is this common knowledge or has this been proven?
So.... the NGK will last up to 100k miles?

NyCSnEaK

01-17-2011, 12:07 PM

WHAT?! Only 30k? Damnit now i regret replacing mine with the IK20's. Is this common knowledge or has this been proven?
So.... the NGK will last up to 100k miles?

I just put the NGK's in and was wondering the same thing?

02ES1

01-18-2011, 02:48 PM

I just replaced my spark plugs for the first time with the NGK Iridiums, and my car just hit 80,000. My old plugs were TOAST! I don't know if I would wait 110,000 miles before checking the condition of my spark plugs. okay okay, so I autocross sometimes and don't exactly baby my engine as far as driving slowly and not getting too close to redline, but it's a stock ass motor lol.

27rocks

01-18-2011, 03:12 PM

I just replaced my spark plugs for the first time with the NGK Iridiums, and my car just hit 80,000. My old plugs were TOAST! I don't know if I would wait 110,000 miles before checking the condition of my spark plugs. okay okay, so I autocross sometimes and don't exactly baby my engine as far as driving slowly and not getting too close to redline, but it's a stock ass motor lol.

Do you go out to the Marina auto-x's?

AKEP

01-18-2011, 03:19 PM

at 80k mine didn't look too bad, honestly. changed them tho.

talonXracer

01-18-2011, 03:37 PM

Stock Iridiums are on their way out at 80k, good call.

introvert

01-18-2011, 06:53 PM

Just hit 85k. Was on the fence about replacing them but will buy denso SKJ20DR-M11 tonite when I get home. Thanks for the input

02ES1

02-04-2011, 11:07 PM

Just hit 85k. Was on the fence about replacing them but will buy denso SKJ20DR-M11 tonite when I get home. Thanks for the input

I think you missed the point. According to what other people are saying the densos ARE NOT good. Replace with NGK.

Do you go out to the Marina auto-x's?
Yeah But I haven't been out this season yet. I was gonna go to the Jan 30 session but things came up.

sLiCk

02-05-2011, 12:05 AM

I replaced my stock ngk iridiums at 60k miles and felt a good increase in power and fuel economy. If anybody is on the fence, do it.

Tortoise

02-05-2011, 01:56 AM

Dont mean to threadjack but what plugs should i use in my new a1?

talonXracer

02-05-2011, 06:41 AM

I think you missed the point. According to what other people are saying the densos ARE NOT good. Replace with NGK.
Yeah But I haven't been out this season yet. I was gonna go to the Jan 30 session but things came up.

Denso's are just as good as the NGK plugs

Dont mean to threadjack but what plugs should i use in my new a1?

Stock Iridium plugs