Iridium spark plugs: yes or no?

**manilenio** · April 28th, 2006 11:44 PM

Tsikoteers,

I'd like to get your learned opinions/experiences with regard to the two brands of iridium plugs we have on the market currently: NGK and Denso. Do you think or know if it is advisable to upgrade(?) to iridium plugs? If yes, which brand is better? Are there considerations for different brands of cars (Denso for Toyota, NGK for Honda, etc.)? If you "upgrade" to iridium plugs, when do you have to replace them again (every 10k, 20k)? Thanks for your inputs!!!

**ineedmorehp** · April 29th, 2006 01:55 AM

Pag may sign na patapos na buhay ng plug. Tried Iridium of Denso to NGK to (forgot the brand)... Nung nagpalit ako wala pang sign ng useless na un plugs.

**lakay** · April 29th, 2006 03:13 AM

Iridium and Platinum sparks plug doesn't increase the power output of your vehicle but rather extent the life of in between changes of spark plugs. When spark is created inside your chambers, it slowly corrode the metal that is acting as a conductor for the high voltage electricity. And at the same time, slowly widening the gap of the two conductors and hereby increasing the need of higher voltage. Since the Platinum is harder and have higher melting temp than regular spark plug metal, they don't require more interval check and changes, and since Iridium is harder and have much more higher melting point than Platinum, then its better than Platinum one. But sometimes the cost of the spark plug make you think, that is it worth it?

Just my 3 cents of opinion

**GlennSter** · April 29th, 2006 04:20 AM

use it if you have heavily modified engine...or ignition system for that matter.

waste of money for stock, imho.

**jim** · April 29th, 2006 08:24 AM

ayaw gumana ng iridium sa XL5 ko kaya Bosch Platin gamit ko. Matagal ang buhay unlike sa ordinary plugs. Once a year na ako nagpapalit unlike dati twice a year.

**finchy18** · April 29th, 2006 08:36 AM

For Stock engine Use NGK

**al_motor** · April 29th, 2006 09:24 AM

Originally Posted by GlennSter

use it if you have heavily modified engine...or ignition system for that matter.

waste of money for stock, imho.

not always true. i don't think it's even good for tuned engines. if running slightly rich on the AFR, it's no good. they foul rather quickly! especially true on turbo engines. my tuner doesn't recommend it. my bro ran a set on his turbo VTi before, kaput after 1000kms, i think even less.

**GlennSter** · April 29th, 2006 09:46 AM

Originally Posted by al_motor

not always true. i don't think it's even good for tuned engines. if running slightly rich on the AFR, it's no good. they foul rather quickly! especially true on turbo engines. my tuner doesn't recommend it. my bro ran a set on his turbo VTi before, kaput after 1000kms, i think even less.

yup.im just saying na i believe na may binabagayan talaga itong mga ganitong klaseng plugs.

some people just use it because of mis information na gaganda ang hatak.pero there are plug specs that they have to consider din.

**BlueBimmer** · April 29th, 2006 09:50 AM

Iridiums are used in some races so i think di naman siguro bobo mga tuners ng professional racers, especially in highly tuned engines.

**speedyfix** · May 1st, 2006 06:22 PM

correct si al na fueling has to be spot on for them to be worth it. for turbo engines na madalas run rich to prevent detonation it's not a wise choice.

i used it on my car tho since before and no problems. had 2 sets, one for the street and another for brc.