Best Long Lasting Spark Plugs? - Page 2

fj6high · 11-04-2009, 09:20 PM

Quote:

DEWFPO previously said:

I have been extremely happy with the factory Denso's and a little anti-seize. After 30K they were only worn .001" off original spec and looked like they could go another 2 rounds before changing.

DEWFPO

Me too, the Denso's have like factory specs on the gap pulled at 35K

I changed to a new set at 50K and the old ones were still good.

**BlackCherryota** · 11-05-2009, 03:31 AM

I just hit 60k not too long ago and needed to change the plugs again, not necessarily because they were insanely worn but moreso because I like to know that the plugs are definitely NOT warn beyond their service life of maximum peformance.

I went in to the parts store and got the NGK V-Power (stock plug for LH head) or so I thought. The kid actually gave me six of the wrong plugs and I did not have the common sense to check them before I left the store. Kinda figured it's not too difficult to misread a six digit number. But anyway, I had to return those and they didn't have the correct plug for the FJ in the V-Power type. Only other choices were the Iridium plugs (massive waste of $$ IMHO) and a new plug called the Denso Platinum TT. I needed plugs because my truck was apart in the driveway and the sun was setting, so I got the Denso TTs. Here is some info on those: DENSO Platinum TT

So far they seem to be a pretty good plug. I gapped them at 0.044" and put them in with a dab of anti-seize. Also added a coating of dielectric grease on all rubber parts of the coils. The regular Denso plugs I had put in around 35k came out looking decent on the electrodes, but a few of them were very corroded where the ceramic meets the steel threads (top side). So regardless of the electrode condition (which was quite good) I am glad I got those out when I did.

I cannot vouch for increase in MPG/power since they were replaced at the same time as engine oil and all gear oils, and have only had them in for about 2k miles so can't speak to long life either. But again they appeared to be well-made, gapped easily, are platinum so should last quite a while, and were reasonably priced (around $5/plug).

HTH.

Sh!tyThePirate · 11-05-2009, 10:57 AM

Quote:

Fjamming previously said:

Plugs are pretty easy to change and cheap enough to not let it be a change deterrant. My last set of factory plugs cost~$20. That's cheaper then oil.

If I bought the ones that last 30-60k, for 40$, thats still less than 5 quarts of RP oil, and it lasts 4-6 times as long so.....

fjrocks · 11-05-2009, 01:54 PM

Quote:

BlackCherryota previously said:

I just hit 60k not too long ago and needed to change the plugs again, not necessarily because they were insanely worn but moreso because I like to know that the plugs are definitely NOT warn beyond their service life of maximum peformance.

I went in to the parts store and got the NGK V-Power (stock plug for LH head) or so I thought. The kid actually gave me six of the wrong plugs and I did not have the common sense to check them before I left the store. Kinda figured it's not too difficult to misread a six digit number. But anyway, I had to return those and they didn't have the correct plug for the FJ in the V-Power type. Only other choices were the Iridium plugs (massive waste of $$ IMHO) and a new plug called the Denso Platinum TT. I needed plugs because my truck was apart in the driveway and the sun was setting, so I got the Denso TTs. Here is some info on those: DENSO Platinum TT

So far they seem to be a pretty good plug. I gapped them at 0.044" and put them in with a dab of anti-seize. Also added a coating of dielectric grease on all rubber parts of the coils. The regular Denso plugs I had put in around 35k came out looking decent on the electrodes, but a few of them were very corroded where the ceramic meets the steel threads (top side). So regardless of the electrode condition (which was quite good) I am glad I got those out when I did.

I cannot vouch for increase in MPG/power since they were replaced at the same time as engine oil and all gear oils, and have only had them in for about 2k miles so can't speak to long life either. But again they appeared to be well-made, gapped easily, are platinum so should last quite a while, and were reasonably priced (around $5/plug).

HTH.

Sorry in advance for my newbie question but do all spark plugs need to be gapped before install if so what are the specs, can any be bought that are already gapped to specs. My FJ is a DD highway vehicle, 30,000 mile coming up and planning on doing things myself and I'm probably going with the stockers but I'll keep reading and getting more suggestions. Thanks for any info.

***Fjamming*** · 11-06-2009, 12:26 AM

Quote:

Sh!tyThePirate previously said:

If I bought the ones that last 30-60k, for 40$, thats still less than 5 quarts of RP oil, and it lasts 4-6 times as long so.....

I think you misread what I typed.

bartt · 11-06-2009, 06:07 PM

Quote:

fjrocks previously said:

Sorry in advance for my newbie question but do all spark plugs need to be gapped before install if so what are the specs, can any be bought that are already gapped to specs. My FJ is a DD highway vehicle, 30,000 mile coming up and planning on doing things myself and I'm probably going with the stockers but I'll keep reading and getting more suggestions. Thanks for any info.

Most plugs come gapped from the factory, but any good wrencher will always check them just to be sure. It only takes a minute.

cruzrman · 11-07-2009, 09:03 AM

Denso Iridiums are the way to go. Yes, they're expensive, but my truck just flat runs better. It idles so smoothly, I've hit the starter a few times thinking the motor wasn't running.
cruzrman

Maxdog · 11-07-2009, 04:02 PM

I'm considering putting in the E3s. I saw an episode of Horsepower a few weeks ago on Spike TV where they wanted to test the claims of E3's manufacturer about the alleged boost in power and MPG resulting from E3s.

So they put E3s in a Chevy V8 motor (I think it was a 350, but not sure) and dyno tested the car at the rear wheels. After multiple tests they showed a marked improvement in horsepower (like 7 or 8 horsepower average) which should translate into increased MPG.

Has anybody noticed better gas mileage with the E3s installed in their FJ?

**DEWFPO** · 11-07-2009, 06:28 PM

Quote:

Maxdog previously said:

I'm considering putting in the E3s. I saw an episode of Horsepower a few weeks ago on Spike TV where they wanted to test the claims of E3's manufacturer about the alleged boost in power and MPG resulting from E3s.

So they put E3s in a Chevy V8 motor (I think it was a 350, but not sure) and dyno tested the car at the rear wheels. After multiple tests they showed a marked improvement in horsepower (like 7 or 8 horsepower average) which should translate into increased MPG.

Has anybody noticed better gas mileage with the E3s installed in their FJ?

To put it into perspective, it depends on what the 7 or 8 HP were on top of, if it was 250 HP with a gain of 7 or 8 HO than that's a gain of ~3%. Something you are not likely to see in the mpg because so many factors affect it.

DEWFPO