changing spark plugs
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Joined: Dec 2008
Posts: 172
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From: VA
I don't see why anyone would go with an aftermarket "gimmick" plug over OEMs... all for like 5 supposed HP and to risk dealing with CELs and such.
Go OEM on the plugs and never look back.
For what its worth... I run el cheapo Autolite plugs in my turbo car and that thing runs like a champ. I would use a high quality plug for the Lexo... but still an OEM replacement.
Go OEM on the plugs and never look back.
For what its worth... I run el cheapo Autolite plugs in my turbo car and that thing runs like a champ. I would use a high quality plug for the Lexo... but still an OEM replacement.
After many years of trying anything that might work, I've come to the conclusion there's no such thing as a "magic" sparkplug which produces more power. Ignition is all based on probability, and your engine needs to have at least 95% ignition to pass OBDII checks for misfire. If you really think there's something to be gained by changing plug brands, I've got some bridges for sale.
The only thing that matters to a sparkplug is heat range and sufficient voltage to jump a spark. If you don't change the ignition, there is nothing about the spark you should expect to be different. The MOST important thing about ignition is having the right A/F mixture at the plug when it fires - regardless of the style of spark.
The only thing that matters to a sparkplug is heat range and sufficient voltage to jump a spark. If you don't change the ignition, there is nothing about the spark you should expect to be different. The MOST important thing about ignition is having the right A/F mixture at the plug when it fires - regardless of the style of spark.
After many years of trying anything that might work, I've come to the conclusion there's no such thing as a "magic" sparkplug which produces more power. Ignition is all based on probability, and your engine needs to have at least 95% ignition to pass OBDII checks for misfire. If you really think there's something to be gained by changing plug brands, I've got some bridges for sale.
The only thing that matters to a sparkplug is heat range and sufficient voltage to jump a spark. If you don't change the ignition, there is nothing about the spark you should expect to be different. The MOST important thing about ignition is having the right A/F mixture at the plug when it fires - regardless of the style of spark.
The only thing that matters to a sparkplug is heat range and sufficient voltage to jump a spark. If you don't change the ignition, there is nothing about the spark you should expect to be different. The MOST important thing about ignition is having the right A/F mixture at the plug when it fires - regardless of the style of spark.
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Joined: Jun 2006
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From: Utah
After many years of trying anything that might work, I've come to the conclusion there's no such thing as a "magic" sparkplug which produces more power. Ignition is all based on probability, and your engine needs to have at least 95% ignition to pass OBDII checks for misfire. If you really think there's something to be gained by changing plug brands, I've got some bridges for sale.
The only thing that matters to a sparkplug is heat range and sufficient voltage to jump a spark. If you don't change the ignition, there is nothing about the spark you should expect to be different. The MOST important thing about ignition is having the right A/F mixture at the plug when it fires - regardless of the style of spark.
The only thing that matters to a sparkplug is heat range and sufficient voltage to jump a spark. If you don't change the ignition, there is nothing about the spark you should expect to be different. The MOST important thing about ignition is having the right A/F mixture at the plug when it fires - regardless of the style of spark.
The only thing I would like to add is; through the years of trying different brands of plugs (Auto and motorcycles), the NGKs last the longest and have NEVER failed. I personally would not even bother using any other brand.
Koz
when our car hit 60k thats when we supposed to change our plugs correct?
if so then i am getting close to that also.
so i really do want to know a little more about these spark plug stuff because this is my first time also about spark plug and etc.
if so then i am getting close to that also.
so i really do want to know a little more about these spark plug stuff because this is my first time also about spark plug and etc.
Lobuxracer your reply was funny to the people who think they gonna gain HP off spark plugs.anyways yeah i want to buy a bridge if you got any left. haha jk. but yeah i'm pretty sure lexus engineers already went through his process that were are going through with Spark Plugs and thats when they came up with the NGK's for the OEM plugs. thats just what i think.so ill stay OEM as they are good enough already. 5hp or less for a CEL ...NOPE!
Another "keep this in mind" - every time you change your plugs, you add a little wear to the plug threads. Many of us use an anti-seize compound on plug threads to minimize wear and maximize electrical conductivity. Still, the Iridium plugs we have today last a very long time compared to the old Champions I remember as a kid and the NGKs I ran in my 1980 750F Honda. The fewer times you replace plugs, the less wear and tear on the cylinder head and the less likely you'll ever strip a plug hole.
For the IS250 (incl AWD) - ND FK20HBR11
For the IS350 - ND FK20HBR11
For the IS-F - ND FK20HBR11
For the IS250C - ND FK20HBR11
For the IS350C - ND FK20HBR11
Notice, there's a bit of a pattern here...and there is no NGK equivalent I can find anywhere.
Lexus part number is 90919‑01249.
Last edited by lobuxracer; Feb 2, 2010 at 05:14 PM.
After many years of trying anything that might work, I've come to the conclusion there's no such thing as a "magic" sparkplug which produces more power. Ignition is all based on probability, and your engine needs to have at least 95% ignition to pass OBDII checks for misfire. If you really think there's something to be gained by changing plug brands, I've got some bridges for sale.
The only thing that matters to a sparkplug is heat range and sufficient voltage to jump a spark. If you don't change the ignition, there is nothing about the spark you should expect to be different. The MOST important thing about ignition is having the right A/F mixture at the plug when it fires - regardless of the style of spark.
The only thing that matters to a sparkplug is heat range and sufficient voltage to jump a spark. If you don't change the ignition, there is nothing about the spark you should expect to be different. The MOST important thing about ignition is having the right A/F mixture at the plug when it fires - regardless of the style of spark.
good infoNGK is awesome. i've had problems in japanese cars and champion plugs
I have worked on many Toyotas and have always ran Denso Iridium IK Series and love them. All the parts on Toyotas (alternators, sensors, etc.) are all usually made by Denso so ive always stuck with them.
Last edited by ahnjae; Feb 2, 2010 at 06:30 PM.
$12.44 is the cost for one plug. Times that by 6 for the IS and its $74.64. So the overall price for plugs are actually pretty expensive depending on the brand your looking for including the material you want to use like iridium, platinum, copper etc.
yea 12.44 is for one plug. i was hoping to find plugs around the price of 8 dollars. 8 dollars is the price of spark plugs that my friend replaced on his 330i. that extra 4 dollars equates to alot when you multiply it by 6 to change all the plugs
