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Old 01-31-2011, 06:53 PM   #27 (permalink)
comptiger5000
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Join Date: Feb 2010
Location: CT, USA
Posts: 544

RaceJeep - '98 Jeep Grand Cherokee (ZJ) 5.9 Limited
90 day: 13.62 mpg (US)
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^ Yup. Most engines are perfectly happy up to 220* or so, with no adverse effects. Some are good to 230*. Taking a look at factory e-fan kick-on points (where applicable) can give you some idea of how hot you can push it safely.
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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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