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Unread 09-17-2013, 05:13 PM   #1
lmanwarren
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2002 KJ Liberty 
 
Join Date: Mar 2013
Location: Norwich, NY
Posts: 41
My first plug change

Well leave this weekend for Virginia Beach. So thought being I get 18 mpg on the highway. I would drop in a new set of plugs. Well haven't had the liberty long but think still on original plugs. Plugs looked the way they should for color. But center was worn down so had .064 gap. Job wasn't bad at all but yeah why down in a hole lol.

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Unread 09-17-2013, 10:02 PM   #2
packdog
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2001 XJ Cherokee 
 
Join Date: Apr 2013
Location: Kelso, WA
Posts: 65
Please update

I would be interested to find out if/how much of a change you get with the new plugs. Please update when you get back from your trip.

And of course have a nice trip and enjoy the beach!
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Unread 09-25-2013, 03:26 AM   #3
lmanwarren
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Update. I'm still at the beach but here is what I have so far. I ended up changing pcv and air filter as well. Now I generally run 5 over the limit. But I decided on this trip. I would do the limit so I would have a base. Well first tank I average 20.14 mpg. Filled up Tuesday for second time. Also the last tank had some highway as well driving around the Virginia Beach Area. Well that tank come out to 19.84 mpg. So I am seeing a difference. Is it all due to plugs or my driving what I should. Not really sure but I will keep it at the limit see what I get long term
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Unread 09-26-2013, 08:12 AM   #4
DaveJKJ
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Quote:
Originally Posted by lmanwarren View Post
Update. I'm still at the beach but here is what I have so far. I ended up changing pcv and air filter as well. Now I generally run 5 over the limit. But I decided on this trip. I would do the limit so I would have a base. Well first tank I average 20.14 mpg. Filled up Tuesday for second time. Also the last tank had some highway as well driving around the Virginia Beach Area. Well that tank come out to 19.84 mpg. So I am seeing a difference. Is it all due to plugs or my driving what I should. Not really sure but I will keep it at the limit see what I get long term
That's not bad.

I just got back from a highway trip too and I noticed a little change with mine after I did the plug change too but mostly just on the highway. (OEM NGK's) I can get 20 highway if I keep moving but as soon as I get off the highway and start driving in traffic and lights etc, ....forgettaaaboooutit.....LOL But I am lifted with bigger tires but I got skids .....ya know.....just to smoothe out the airflow underneath my 4,200lb pig....LOL
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Unread 09-27-2013, 12:04 PM   #5
packdog
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Thanks for letting us know. That is a pretty big improvement for just plugs, so I will definitely keep an eye on mine.

I changed mine when I first got the Jeep - they were about the same condition as your old ones. I didn't check the mileage before I gave it a tune-up, so I don't know where it was. I have not been able to break out of the 19.xx bracket on highway trips.

I think that in general running plugs in good condition will help with engine life by preventing misfires and ignition knocks.
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Unread 09-27-2013, 12:37 PM   #6
tommudd
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2004 KJ Liberty 
 
Join Date: Aug 2008
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Mines changed every 25000 or so, they're cheap, easy to change so why do some wait so long??
21-22 on the hiway and mines a pretty heavy little piglet
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Unread 10-01-2013, 05:11 AM   #7
94beachxj
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I do not burn the Corn gas in my jeeps, if I can not get to a "real gas" station I will use Lucas Ethonal killer! THE Bottom line here is I avg 25 mpg on the hwy in my 2005 Libby.
I own 3 jeeps, and if you can avoid that corn gas you will save ton of $$$$ in the long run imo.

My 94 Cherokee gets 21-23 mpg btw,,,,,,,,,, Clunker? lol

Still breaking in the New wrangler, but I will not burn that gas a hol in any engine I own.
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