I've been installing copper plugs such as Campions into the XJ 4.0L.
Recently came across some closeouts on spark plugs for $2.55 each. Have a store credit so I thought I would add a few of the closeout items where needed.
However I know very little about different plug types and designs other than the copper plugs.
BOSCH 4308 PLATINUM+2 - ( Platinum Lasts up to 2x longer than standard / copper plugs)
E3 SPARK PLUGS E358 (Standard / Copper )
Are these worth the additional expense?. . Copper plugs start at around $1.38 for AUTOLITE 985
Like some others have pointed out, keep it simple, Champion Copper Spark Plugs for the Jeep. Jeep's seem to be real sensitive if you start putting in different types of spark plugs so leave it OEM & that means no problems.
06 Jeep GC Limited Trail-Rated 4X4 4.7 V8 - Blue
00 Jeep GC Laredo 4X4/2WD 4.0 I6 - Green