Platinum or better spark plugs?
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Sumbeach84
- 50_Posts
- Posts: 81
- Joined: Mon Apr 11, 2016 6:12 pm
- Model Year: 2009
- Location: Michigan
Platinum or better spark plugs?
09 with a 2nd gen 5.7 Hemi. I know they come stick with copper plugs I've heard you can't switch to platinum or iridium plugs? Something about they don't run right or can cause check engine lights. Doesn't make sense to me but I'm sure someone has done it. Any input would be appreciated I'm def way over due she's got a nice stumble on hard acceleration. So coppers? Or best recommendation
Re: Platinum or better spark plugs?
It's been my experience that there's no performance gain to be had from fancy plugs, copper or platinum etc is more about plug change intervals than anything. Mopar cheapie plugs are ngk LZFR5C-11 which are copper core plated and have nickel electrodes. When I bought my truck (09 2nd owner) it had e3 triple electrode plugs in it and it ran fine for months before I changed plugs. There was no discernible difference between them and the ngk.
Central Texas and Houston area
2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
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nts007
- 2000_Posts
- Posts: 2284
- Joined: Wed Dec 11, 2013 10:01 pm
- Model Year: 2008
- Location: Sask, Canada, Earth
Re: Platinum or better spark plugs?
Highest recommendation is to stay with the factory champion plugs.
08 ctd--mini max--thuren 3" coils and LT Leaves--4.56 gears and lockers in pw axles--some lights--afe intake system--bd super b turbo--Banks w/m Injection--Dynatrac Balljoints--king 2.5"s--37" Hankook Dynapro MT--DOR Long arms--Custom emf track bar--Manual T-case swap--Full PW Under armor--PSC Hydro Assist and so much more
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FirerescuePW
- 1000_Posts
- Posts: 1661
- Joined: Sun May 20, 2012 12:51 pm
- Location: North Wales, PA
Re: Platinum or better spark plugs?
We had major discussions about this over on Brand X forum. Majority opinion was to stick with OEM recommended plugs and change them at recommended intervals. Our interval is short compared to most other brands, so degradation isn't a problem. Some tried different plugs and actually switched back to OEM due to performance issues. E3s didn't fare well, IIRC.
'05 Mineral Gray Power Wagon QC #1005
WINCH MOB PROUD!
SuperChips FlashPaq; DT ProFab Steering Brace; 08.5 Steering linkage (twice); Toyo Open Country M/T 35/12.50x17; Carli front diff guard; Rockcrusher rear diff cover; White Knuckle Offroad Rock Rails; Carli 3"coils, track bar, and High Clearance Control Arms; Carli King 2.5" Remote Resi Shocks; Reflex spray-in liner; Extang Trifecta tonneau cover; Pop Lock electric tailgate lock (OOS); Tekonsha Prodigy brake control; LEDS & Strobes & Siren; Winch TPS Bypass; Warn Wireless Remote; Dog hair, and a BIG Wish List!
WINCH MOB PROUD!
SuperChips FlashPaq; DT ProFab Steering Brace; 08.5 Steering linkage (twice); Toyo Open Country M/T 35/12.50x17; Carli front diff guard; Rockcrusher rear diff cover; White Knuckle Offroad Rock Rails; Carli 3"coils, track bar, and High Clearance Control Arms; Carli King 2.5" Remote Resi Shocks; Reflex spray-in liner; Extang Trifecta tonneau cover; Pop Lock electric tailgate lock (OOS); Tekonsha Prodigy brake control; LEDS & Strobes & Siren; Winch TPS Bypass; Warn Wireless Remote; Dog hair, and a BIG Wish List!
Re: Platinum or better spark plugs?
Just to clarify, stick with stock plugs and oem changing interval. Champions used to be oem but they've switched to ngk for the factory plugs now, at least for 09 and up hemis. The ngk LZFR5C-11 is the mopar oem plug for your truck. I'm sure the champions used on earlier trucks would be just fine though.
Central Texas and Houston area
2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
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nts007
- 2000_Posts
- Posts: 2284
- Joined: Wed Dec 11, 2013 10:01 pm
- Model Year: 2008
- Location: Sask, Canada, Earth
Re: Platinum or better spark plugs?
Didn't know they switched to the ngk!! Thx for the update. thats what happens when your last pw was an 06.Colibri wrote:Just to clarify, stick with stock plugs and oem changing interval. Champions used to be oem but they've switched to ngk for the factory plugs now, at least for 09 and up hemis. The ngk LZFR5C-11 is the mopar oem plug for your truck. I'm sure the champions used on earlier trucks would be just fine though.
Fortunately I haven had to change the spark plugs in this truck for 340k km now.
08 ctd--mini max--thuren 3" coils and LT Leaves--4.56 gears and lockers in pw axles--some lights--afe intake system--bd super b turbo--Banks w/m Injection--Dynatrac Balljoints--king 2.5"s--37" Hankook Dynapro MT--DOR Long arms--Custom emf track bar--Manual T-case swap--Full PW Under armor--PSC Hydro Assist and so much more
Re: Platinum or better spark plugs?
Hahaha damn you and your compression ignition torque monster 
Central Texas and Houston area
2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
2009 5.7 auto quadcab
Carli 3” coils deaver leafs 3” kings with 4 tube bypass rear and fr/rr hydro bumps
Howe steering pump and gear with hydraulic ram assist
Custom tube bumpers and white knuckle sliders
Creative fab trussed axle. rem polished and cryoed 5.13 gears with arb lockers fr/rr
Sharadon stage 2 545rfe with 3000 stall edge converter
Lots of other stuff lol
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Sumbeach84
- 50_Posts
- Posts: 81
- Joined: Mon Apr 11, 2016 6:12 pm
- Model Year: 2009
- Location: Michigan
Re: Platinum or better spark plugs?
Thanks everyone! OEM it is
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TwinStick
Re: Platinum or better spark plugs?
I changed my stock factory plugs @ 41,000 miles. Plug gap was .050 on old plugs. I used Champion double platinum, just so i don't have to change em every 30-40k. New ones are gaped to .044 & anti-siezed. No noticeable difference in the way it runs or gas mileage/or lack there of ! 
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08TwinStickPW
- 250_Posts
- Posts: 274
- Joined: Wed Aug 22, 2012 9:24 am
- Model Year: 2008
- Location: Ulster County, NY
Re: Platinum or better spark plugs?
I did the cheaper Iridiums of Rock auto, ran the same after, been 2 years and no codes or issues.
It was $20 more for better plugs.
Like everyones says the stock plugs are what the hemi likes most.
It was $20 more for better plugs.
Like everyones says the stock plugs are what the hemi likes most.
08' Dodge RAM PowerWagon (Laramie, 6 Speed)
GO: Diablo tuned, AEM drop in, Magnaflow "Y" and 24" muffler (dumper over the axle)
Traction/Suspension:305-70-17 Toyo AT2's, DT Profab Steering Brace, Carli front diff guard.
See: Silver stars headlights, 9012 fogs, reprogrammed for fogs with high beams, (2)6" KC LED gravity in driving/spread behind the grill
Tunes
ioneer AVH-X5800BHS w/stock infinity amp, Infinity ref. dash/reardoor speakers, kappa component front door, JL rear stealth box and JX500.1d.
Other: Dually marker light under the tailgate, 2013+ Red hemi badges, Bedtred bedliner and mopar rubber mat, Wheel well liners, rubber flaps, Bakflip MX4, W2W Mopar steps (bedlined black), weathertech front mats and rain deflectors.
GO: Diablo tuned, AEM drop in, Magnaflow "Y" and 24" muffler (dumper over the axle)
Traction/Suspension:305-70-17 Toyo AT2's, DT Profab Steering Brace, Carli front diff guard.
See: Silver stars headlights, 9012 fogs, reprogrammed for fogs with high beams, (2)6" KC LED gravity in driving/spread behind the grill
Tunes
ioneer AVH-X5800BHS w/stock infinity amp, Infinity ref. dash/reardoor speakers, kappa component front door, JL rear stealth box and JX500.1d.Other: Dually marker light under the tailgate, 2013+ Red hemi badges, Bedtred bedliner and mopar rubber mat, Wheel well liners, rubber flaps, Bakflip MX4, W2W Mopar steps (bedlined black), weathertech front mats and rain deflectors.
Re: Platinum or better spark plugs?
+1 for stock plugs and stock interval.
I run the nice Iridium ones in my moto, but that only needs one plug, and I change it every year or two.
Plugs do need to be changed out periodically though.
I run the nice Iridium ones in my moto, but that only needs one plug, and I change it every year or two.
Plugs do need to be changed out periodically though.
Re: Platinum or better spark plugs?
Stock plugs at 60K miles here. Works fine. 150K+ on the engine, smooth as butter. You'll begin to notice a slight idle irregularity if you go to 70K...
2010 with 37" hooves, controlled by numerous Thuren parts and Thuren Custom King 2.5's (Moved to a new home)
viewtopic.php?f=13&t=2333
I only do what the majority of the 4 voices in my head tell me to. In most cases, I ignore two of them because one doesn't speak English, and I suspect the other is talking to someone else.
viewtopic.php?f=13&t=2333
I only do what the majority of the 4 voices in my head tell me to. In most cases, I ignore two of them because one doesn't speak English, and I suspect the other is talking to someone else.
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Sumbeach84
- 50_Posts
- Posts: 81
- Joined: Mon Apr 11, 2016 6:12 pm
- Model Year: 2009
- Location: Michigan
Re: Platinum or better spark plugs?
Trucks got 120k on it now I've had it for about 15k. No idea on maintenance of it but it's got a stumble under hard accel which is often with my driving habits lol. What can I say I love the sound of straight pipes lol