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Topic Review (Newest First)
04-25-2013 06:45 PM
LiftedTj
Quote:
Originally Posted by Jerry Bransford View Post
OMG, you saved $2.80 per plug for a grand savings of $16.80 over what I paid for my iridium-tipped XP985 plugs. Wow, I was barely able to afford that additional $16.80 for plugs that will outlast those conventional plugs by 4-5X.

That works out to me having paid 2.6X more for a spark plug that will perform well for a proven 4-5X as long. I guess I'm just not as penny-wise as you.
Lol
04-25-2013 05:59 PM
Jerry Bransford
Quote:
Originally Posted by gregsjeep13 View Post
I recently bought a 97 Sport 4.0 that has 110,000 any suggestions on which plug I should use? Thanks.
Single-platinum tipped like the Autolite AP985 or Champion 3034 are perfect for '99 or older distributor-equipped 4.0L engines, so is the iridium XP985. The first two are good for 100k miles, the iridium is looking like it'll be performing well pretty close to 200k miles.
04-25-2013 05:50 PM
gregsjeep13 I recently bought a 97 Sport 4.0 that has 110,000 any suggestions on which plug I should use? Thanks.
04-25-2013 05:05 PM
Jerry Bransford Thanks for the clarification, I misread what you were saying. back atcha.
04-25-2013 04:59 PM
Gold Miner
Quote:
Originally Posted by Jerry Bransford View Post
OMG, you saved $2.80 per plug for a grand savings of $16.80 over what I paid for my iridium-tipped XP985 plugs. OMG, I was barely able to afford that additional $16.80.

That works out to me having paid 2.6X more for a spark plug that will perform well for a proven 4-5X as long. I guess I'm just not as penny-wise as you.
Valid point fer sure.
The only irony here is that I followed your advice when I last changed plugs.
I'm happy with copper and if I get another 100K out of this engine I'll be very satisfied.
I value your advice here very much and always appreciate your views Jerry.
This site has helped me tremendously during the short time I've been here thus far.
04-25-2013 04:50 PM
birdy35 Thanks everyone!
04-25-2013 04:48 PM
Jerry Bransford
Quote:
Originally Posted by Gold Miner View Post
I just checked the records for my '01 Sahara.
Last plugs I put in were Autolite Copper 985. They cost $1.71 each.
OMG, you saved $2.80 per plug for a grand savings of $16.80 over what I paid for my iridium-tipped XP985 plugs. Wow, I was barely able to afford that additional $16.80 for plugs that will outlast those conventional plugs by 4-5X.

That works out to me having paid 2.6X more for a spark plug that will perform well for a proven 4-5X as long. I guess I'm just not as penny-wise as you.
04-25-2013 04:37 PM
Gold Miner I just checked the records for my '01 Sahara.
Last plugs I put in were Autolite Copper 985. They cost $1.71 each.
04-25-2013 04:30 PM
Jerry Bransford
Quote:
Originally Posted by birdy35 View Post
It's a 2006 rubicon
The dual-platinum tipped Autolite APP985 and Champion 7034 plugs will both perform very well for 100K miles. The latest iridium-tipped Autolite XP985 will likely do the same for 200k miles.

Be wary of other plugs, 2000 and newer 4.0L engines (because they are distributorless) are very fussy about what spark plugs they will perform well with. Specifically, avoid any single-platinum tipped plugs like the Autolite AP985 or Champion 3034 which will eventually cause idle and/or misfire types of problems.
04-25-2013 04:26 PM
birdy35 It's a 2006 rubicon
04-25-2013 04:13 PM
Jerry Bransford Copper works fine, the right model platinum & iridium-tipped plugs work fine too... they just last 3-4X as long as conventional plugs do.
04-25-2013 04:12 PM
Gold Miner There is no magic plug for the 4.0L as far as I know.
Best advice I've gotten here is to stick as close to OEM as possible. I followed that advice and never looked back, running like a champ. I stuck with copper.
This is a case where cheaper actually is better.
04-25-2013 04:12 PM
Jerry Bransford What model year?
04-25-2013 04:05 PM
birdy35
4.0 spark plugs

What are the best spark plugs for the 4.0

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