Best brand of spark plug.
Newbie
Joined: Sep 2011
Posts: 9
Likes: 0
Model: Cherokee
I worked in a Jeep dealership for years and it was always Champions for the jeeps and AC for our GM products... the Ford dealer only sold us Motorcraft when tuning a used vehicle... for myself, I've always followed these rules and had no problems,,,,,
Senior Member
Joined: Aug 2011
Posts: 760
Likes: 6
From: Landers, CA
Year: Several
Model: Cherokee
Engine: 4.0
You might want to tell Wikipedia they are wrong.
http://en.wikipedia.org/wiki/Champion_%28spark_plug%29
Autolite WAS owned by Ford, till FRAM bought them. Then FRAM and Autolite split up - both are owned by Hoffman now.
BOTH maintained their poor quality.
GM DID own AC, till they sold it off several years ago.
Look it up!
http://en.wikipedia.org/wiki/Champion_%28spark_plug%29
Autolite WAS owned by Ford, till FRAM bought them. Then FRAM and Autolite split up - both are owned by Hoffman now.
BOTH maintained their poor quality.
GM DID own AC, till they sold it off several years ago.
Look it up!
CF Veteran
Joined: Aug 2010
Posts: 1,150
Likes: 1
From: Nashville, TN
Year: 1997, 1993
Model: Cherokee
Engine: 4.0L
I've had Bosch Platinums cause driveability problems in a Honda CRX and an Alfa Romeo. Switched to NGK and problem solved.
The issue with 100,000 mile plugs that has come to light in recent years is that they like to pull the threads out of the aluminum heads cuz they haven't been moved for so many miles. We used to maintain a budget truck fleet. The recommended interval for plug change was 96,000 miles. I dreaded it cuz you were very likely to pull a spark plug and have the threads pull out of the head with it.
The issue with 100,000 mile plugs that has come to light in recent years is that they like to pull the threads out of the aluminum heads cuz they haven't been moved for so many miles. We used to maintain a budget truck fleet. The recommended interval for plug change was 96,000 miles. I dreaded it cuz you were very likely to pull a spark plug and have the threads pull out of the head with it.
Yup, worked on a friend's Nissan with 100K+ on the factory plugs and had to drill and coil the head because the plugs stripped the aluminum on the way out...
What a pain
Senior Member
Joined: Dec 2008
Posts: 564
Likes: 0
From: Aldergrove,BC,Canada
Year: 1989
Model: Wagoneer
Engine: 4.0L I6
general rule of thumb for jeeps has always been champion truck plugs, the 4.0L were far from a performance engine that dont need fancy overpriced plugs, ive actually seen some jeeps that ran bad if they ran at all with the fancy plugs.
champion truck plugs or the or the NGK equivalent is what i run.
champion truck plugs or the or the NGK equivalent is what i run.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
general rule of thumb for jeeps has always been champion truck plugs, the 4.0L were far from a performance engine that dont need fancy overpriced plugs, ive actually seen some jeeps that ran bad if they ran at all with the fancy plugs.
champion truck plugs or the or the NGK equivalent is what i run.
champion truck plugs or the or the NGK equivalent is what i run.
I agree. I'm kinda partial to NGK and use them in everything I own, mostly because of my experience selling them for years at a foreign car parts store and a Datsun dealership.
We don't need any gimmicky plugs.
Member
Joined: Jun 2011
Posts: 242
Likes: 1
From: Portersville, Pennsylvania
Year: 1997 & 1998
Model: Cherokee
Engine: 4.0
You guys are right on one thing. You cannot go wrong with a traditional copper plug. I used Champs long before I switched to Bosch. I'd still use them as they have been consistantly good products over the years.
Bottom line is that go with what works for you. Engines can be part fickle. Plugs are one of the big items that fit this bill. I've had more experience with Jap motorcycle engines than cars. I've only owned a few foreign cars, three Subarus, a Toyota, and a Mazda. They were the worst on fickleness to specific brands of plugs and always liked the ones like the NGKs. I don't know why that is, but I agree that it is a fact. BTW, the bike engines were more fickle than the cars.
Bottom line is that go with what works for you. Engines can be part fickle. Plugs are one of the big items that fit this bill. I've had more experience with Jap motorcycle engines than cars. I've only owned a few foreign cars, three Subarus, a Toyota, and a Mazda. They were the worst on fickleness to specific brands of plugs and always liked the ones like the NGKs. I don't know why that is, but I agree that it is a fact. BTW, the bike engines were more fickle than the cars.
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