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Toyota Scepter
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Discussion Starter #1
I am using a set of NGK BKR6E-11 (nickel alloys) when I should have put in NGK BKR6EP-11s (platinum). I am about to change them now because I am not really sure about the negative effects of putting in lower type or colder ones.
 

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NGK Iridiums.
 

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1996 Camry 5SFE 5spd
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This is going to sound crazy but what the hell...

I changed the plugs on my sister's 2000 Jeep Cherokee 6-cyl and they happened to fit into my 5S Camry. About 18 months ago I put Bosch +4 fancy-schmancy whatever plugs in my Camry and forgot about them until a couple of weeks ago. Turns out the electrode on three of the Bosch plugs somehow protruded past the insulator (it was flush when new) over time and was causing detonation.

So I got the idea of "let's just see" and attempted to fit the Cherokee plugs into the Camry. They are the same except that the Cherokee plugs are about a quarter inch deeper into the combustion chamber than the Bosch plugs. I thought at first I might have interference with the piston tops, but turns out not to be the case.

Result? I think that since the plugs are deeper into the CC that it effectively advances ignition timing (I may be wrong - lemme get y'alls thoughts here); since the flame front starts that much closer to the piston top. The car runs better throughout the entire RPM range and city mileage has increased as well (maybe because the plugs are different, and don't have the hotspots) from 23 to 25MPG

By the way, the plugs that came out of her Jeep were NGKs - nothing fancy, no platinum/iridium tip, just plain old NGKs
 

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Lighting Specialist!
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This is going to sound crazy but what the hell...

I changed the plugs on my sister's 2000 Jeep Cherokee 6-cyl and they happened to fit into my 5S Camry. About 18 months ago I put Bosch +4 fancy-schmancy whatever plugs in my Camry and forgot about them until a couple of weeks ago. Turns out the electrode on three of the Bosch plugs somehow protruded past the insulator (it was flush when new) over time and was causing detonation.

So I got the idea of "let's just see" and attempted to fit the Cherokee plugs into the Camry. They are the same except that the Cherokee plugs are about a quarter inch deeper into the combustion chamber than the Bosch plugs. I thought at first I might have interference with the piston tops, but turns out not to be the case.

Result? I think that since the plugs are deeper into the CC that it effectively advances ignition timing (I may be wrong - lemme get y'alls thoughts here); since the flame front starts that much closer to the piston top. The car runs better throughout the entire RPM range and city mileage has increased as well (maybe because the plugs are different, and don't have the hotspots) from 23 to 25MPG

By the way, the plugs that came out of her Jeep were NGKs - nothing fancy, no platinum/iridium tip, just plain old NGKs
Try some A/B/A testing to see if what you're saying is really true and report back :thumbsup:
 

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Toyota Scepter
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Discussion Starter #8
I have Denso SK20R-11 plugs with 0.7mm gap.Original gap was 1.1mm and i reduced to 0.7mm for better performance.
I haven't tried that yet. Is the difference noticeable?
 

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イリジウム
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I'd use NGK Iridium-IX. If you have the waste spark system then you can't use the NGK Laser Iridium, which has a platinum ground pad. The Laser Iridiums are good for 120K miles on Gen 5+.

Always verify the application on the manufacturer's catalog:
www.ngksparkplugs.com




I am using a set of NGK BKR6E-11 (nickel alloys) when I should have put in NGK BKR6EP-11s (platinum). I am about to change them now because I am not really sure about the negative effects of putting in lower type or colder ones.
 

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イリジウム
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1996 Camry 5SFE 5spd
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Try some A/B/A testing to see if what you're saying is really true and report back :thumbsup:
Sorry, I was too hasty in the discovery to save the old plugs, but the trusty seat-of-the-pants dyno seems to indicate an improvement in power and possibly economy - I'm usually pretty scientific about stuff like this, but this last time I'll admit I was cutting corners - had other stuff going on:thumbsdow

I guess I could get new Jeep plugs and new Camry plugs and do the A/B/A testing and see what happens - if so I'll start a new thread...
 

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2006 Scion tC
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NGK Laser Platinums - BKR6EKPB-11
 

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What Toyota?
2008 Saab 9-3
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I ran NGK Laser Iridiums... no issues for the last 20k miles or so of her life.
 

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Toyota Scepter
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Discussion Starter #17
Has anyone tried Autolite XP Iridiums? Insights would be nice because they're from the US.
 

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2008 Saab 9-3
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With the amount of "only use NGK or Denso spark plug" people here (myself included), I'd say to stick with what works for us.
 

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Toyota Scepter
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Discussion Starter #19
With the amount of "only use NGK or Denso spark plug" people here (myself included), I'd say to stick with what works for us.
I understand. I am also an "NGK or Denso" only person :thumbsup:.
 

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Toyota Scepter
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Discussion Starter #20
Do you guys have any idea why the 5SFE takes "platinum plugs only?"
 
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