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Old 05-15-2006, 04:33 PM   #1
hockeyhair55
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Default V8 Grand Cherokee

postin for a friend. he wants a v8 grand cherokee and doesnt wana have to pay for preimuim gas. does the ZJ 5.9 v8 or the 5.2 v8 take premium gasoline? also does the wj 4.7 take premium.
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Old 05-15-2006, 04:44 PM   #2
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the 5.2 will run on 87 just fine, the 5.9 will not.
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Old 05-15-2006, 04:46 PM   #3
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the 4.7 non HO doesn't run on premium afik, not sure about the 4.7ho.
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Old 05-15-2006, 05:04 PM   #4
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5.9 can be flashed at the dealership to run on lower grade gas...but some say it nueters it too much
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Old 05-15-2006, 05:08 PM   #5
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Yea, like all they said, 5.2 runs on regular, 5.9 on premium. Some 5.2s might need premium, my rents one did back when they had it, but I think its pretty rare as mine runs fine on crap gas
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Old 05-15-2006, 05:10 PM   #6
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4.7s all run on reg
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Old 05-15-2006, 07:40 PM   #7
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my 5.2 knocks on reg, so I run mid grade
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Old 05-15-2006, 08:19 PM   #8
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i used midgrade in my 5.2...
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Old 05-15-2006, 08:46 PM   #9
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Quote:
Originally Posted by DOUBLE D XJ
my 5.2 knocks on reg, so I run mid grade
yeah, i guess mine did a bit whenever i was pulling something heavy. isn't regular, 85 octane out there?
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