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Old 01-06-2011, 01:03 PM   #8 (permalink)
comptiger5000
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Join Date: Feb 2010
Location: CT, USA
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RaceJeep - '98 Jeep Grand Cherokee (ZJ) 5.9 Limited
90 day: 13.62 mpg (US)
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In many cases, that's true. However, if you can up the t-stat temp without increasing air intake temps (dependent on manifold design), you get even better power due to keeping the dense air charge and increasing the engine's thermal efficiency.
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Call me crazy, but I actually try for mpg with this Jeep:



Typical driving: Back in Rochester for school, driving is 60 - 70% city
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