How many miles do you have? That is right about where I am averaging with 3,500 miles on mine but that mainly has to do with my driving. Almost all city with probably 30 miles a week of highway which I am running at 70-80 which does not help. Not sure what you need to check but are you positive that you didn't drive it harder than normal on this tank? Don't think you will gain anything going with premium that would be a benefit worth the added cost.
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I don't care about the "Jeep thing"  as long as my mail is on time!!!
Slate Blue H3 Adventure w/sunroof, Monsoon/NAV, DVD and marker lights
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