Anyone has experience with actual mpg difference when running 37s on the the newer JKU's penstar powerplant? Not withstanding the reasons why or not to run 37s but just a mpg question.
Thanks
How many MPG with 37s and 4.10 on the new JKU/penstar?
I have 37s on 4.56 gears and average 13 or so in hilly areas. You can make due with 4.10 but it won't be ideal but also not completely terrible. The new motor makes so much more power you don't have to gear as deep as the 3.8 guys.
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