LibertyOrDeath
Full Access Member
I am going to be changing my plugs out this week and I was thinking maybe Bosch Platinum +4. This is my first plug change in my Liberty. Anyone out there have a better plug I should use.
Recommended spark plugs
- Thread starter LibertyOrDeath
- Start date
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JeepJeepster
Full Access Member
rubbish
Use either NGK or autolights. I used Autolight Double Platinum myself.
Use either NGK or autolights. I used Autolight Double Platinum myself.
BoyNamedSue
Full Access Member
Just wondering why not use same plugs that it was built with?
I know they don't last long, but you would think you would at least have no problems with them since Jeep spec'd the Liberty with them. If you're going to change them every 25,000 miles or so, it wouldn't really matter if they don't last long.
Do different brands/types of plugs actually improve performance?
I know they don't last long, but you would think you would at least have no problems with them since Jeep spec'd the Liberty with them. If you're going to change them every 25,000 miles or so, it wouldn't really matter if they don't last long.
Do different brands/types of plugs actually improve performance?
jeepkj02
Full Access Member
I use autolite platinums (single).
Marlon_JB2
Kombat Edition Jeep
I've noticed a slight MPG increase using Bosch Platinum plugs. (Yes, an actual increase, NOT just restored MPG from getting a tune up.)
I didn't use the +4 though... those just look scary to me.
seriouse
New Member
I use NGK iridium
Do you know the part number?
I'm searching and coming up with the following from apwonline.com
NGK Base Iridium IX Spark Plug ZFR6FIX-11 list $16.75 cost $6.59
and
NGK Stock Numbers Iridium IX Spark Plug 6441 list $10.49 cost $6.59
It doesn't appear they are the same based on the list price.
JeepJeepster
Full Access Member
I dont have the NGK part numbers but I have the Autolight double platinums.
http://img.photobucket.com/albums/v612/jeepjeepster/30k service/DSCF8912.jpg
http://img.photobucket.com/albums/v612/jeepjeepster/30k service/DSCF8912.jpg
seriouse
New Member
I'm using ZFR6FIX-11 part number 6441 i bought them at Pep Boys for $7.99 each. The part number is correct. 6441 for the spark plug ZFR6FIX-11 so i dont know why they have a different list price.
Last edited:
LibertyOrDeath
Full Access Member
I decided on the +4's they had a money back guarentee if I didn't have a noticeable improvement in both power and economy. When I swapped my plugs all of the gaps had eroded to .050. So far I have seen a slight power increase towards the top and a minor MPG improvement. I can also corner better, have more ground clearance, and my brakes work so much better.:^o
<--edit--- That's actually a bit creepy.
sevenhelmet
Full Access Member
Autolite double platinums. Avoid OEM and Champion.
LibertyOrDeath
Full Access Member
I was undecided between NGK Iridium and BP +4. I got the +4's because they had a money back guarantee.
tjkj2002
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Denso Iriduims are the best I have ever ran.
LibertyOrDeath
Full Access Member
Well since you got pretty good mileage on that trip to Moab I might just throw some in the next time I need plugs.
tjkj2002
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I'm actually using AutoLite double platnuims right now,I just have been lazy about ordering the Denso's,to many other parts need buying first(SFA swap).
how about those split fires ?? http://www.autosupermart.com/store/shop/splitfire00001.html
i havent used them just asking.
i havent used them just asking.
LibertyOrDeath
Full Access Member
wtf.gifchairshot.gifpukey.gifgetout.gif
But seriously. They aren't called SplitFoulers for nothing.
But seriously. They aren't called SplitFoulers for nothing.
jg45
New Member
Just watch the Bosch Platinums. They seem to not like the type of ignition system used. I was running the +2 and then one day the engine stumbled pretty hard coming off from a red light. I pulled the plugs and noticed metal transfer to the center electrode from the ground electrode. Google Bosch Platinum and Waste Spark ignition for more information.
NomadKJ
Full Access Member
indianrefining
Full Access Member
Using the "Plus 4" plugs will make one (and only one) difference: more empty space in your wallet.
