E3 spark plugs?

[hall'sz28]

Anyone use these plugs? If so what's ur opinion?

[silverWS6]

I haven't used them, but I have read that they are just a waste of money so I just stick to the usual Tr55 or 103's

[whitdog54]

no! tr55s or autolites like said above.

[SMWS6TA]

I'm using them in my DD for the last 7 months. No changes for what I can tell.

I get about the same gas mileage and no drop or increase of HP per butt dyno.

So for my next spark plug change I'll go back to OEM plugs. Spend less.




I will not use these in the T/A. why you ask.


Copper plugs like the TR55 is still the best plug to get.

Iridium plugs are the next best thing, they get within the low output range of copper plugs but last much longer then platinum plugs.

If you're looking for HP get copper, if looking for best bank for the buck = iridium. Copper last about 25k miles while iridium can last to 70k.

[tpcaz]

Agreed..... as long as your not spraying.

[herculesrider1]

So Scott, is Iridium OEM? You say that you will spend less, but if 41-110 Iridium is OEM, $9.36ea is not cheap. What OEM plugs are you referring to? Thanks man.

[2002ssslp]

I put them in my lawn equipment, they seem to work ok but that is with 2 cycle engines. I don't know anyone who uses them in 4 cycle engines.

[pajeff02]

Personally, I think it is simply advertising hype. However, I do like the longevity of platinum plugs and the Delco Iridiums really do have a 100,000 mile service life. As for our Trans Am, she happily runs NGK TR-55's.

[SMWS6TA]

So Scott, is Iridium OEM? You say that you will spend less, but if 41-110 Iridium is OEM, $9.36ea is not cheap. What OEM plugs are you referring to? Thanks man.

Sorry I had to reread thread to know what you were talking about.

In regards to the E3 plug, was using them for my DD (Mitsubishi Galant 4 cyl) for a year, saw no changes so I swapped back to iridium plugs.


Now if you're looking for a great iridium plug for the LS1 that gets good spark and last a long time then get NGK-TR55IX. I used them when I first got my car and ran them for a year. I swapped over to NGK-TR55's on a whim to see what everyone that had them was talking about. I can say since then my engine was very happy using them.

Now if you are spraying you'll want to use TR-6's.

How does is spending $9.36 ($74.88) cheaper then $3 to $6.40 ($24 to $51.20 prices vary depending on where you purchase) for TR55's?

That Iridium plug last for 100,000 miles (or should) while the life span of a TR55 copper plug is about 25,000 miles. Using the TR55's I will need 4 sets to get to the 100,000 that the Iridium plug will need to be changed.

So $74.88 vs $96.00 -$204.80

Like I stated before if your car is a DD the iridium plug is your best bet, if your car is a street/track warrior then TR55's are for you.

[herculesrider1]

Sorry I had to reread thread to know what you were talking about.

In regards to the E3 plug, was using them for my DD (Mitsubishi Galant 4 cyl) for a year, saw no changes so I swapped back to iridium plugs.


Now if you're looking for a great iridium plug for the LS1 that gets good spark and last a long time then get NGK-TR55IX. I used them when I first got my car and ran them for a year. I swapped over to NGK-TR55's on a whim to see what everyone that had them was talking about. I can say since then my engine was very happy using them.

Now if you are spraying you'll want to use TR-6's.

How does is spending $9.36 ($74.88) cheaper then $3 to $6.40 ($24 to $51.20 prices vary depending on where you purchase) for TR55's?

That Iridium plug last for 100,000 miles (or should) while the life span of a TR55 copper plug is about 25,000 miles. Using the TR55's I will need 4 sets to get to the 100,000 that the Iridium plug will need to be changed.

So $74.88 vs $96.00 -$204.80

Like I stated before if your car is a DD the iridium plug is your best bet, if your car is a street/track warrior then TR55's are for you.

Thanks Scott. I had no idea that iridium was OEM. Knowledge is a good thing. I picked up some ACDelco Iridiums at AutoZone for
$4.99 after rebate from ACDelco. Not worth it to me changing out plugs four times as frequent. Now, If I could see the firewall on our cars....maybe, just maybe I might go TR55's.

[SMWS6TA]

It's not to bad.....remove the coil packs on #6 & 8 and you'll have more room. You may also have to go form the bottom for #8. This is if you have the stock headers.


IMHO spark plug changes justify getting long tube headers.


Also I'm not saying copper base plugs will shave off a tenth of a mile but every little thing helps.