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Old 12-26-2010, 11:34 AM   #39 (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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The 4.0 V6 in the explorer isn't exactly a high power engine, so matching it with a diesel is easy enough. A 4bt is a known good swap, and still gets great mpg, particularly on the highway. I could definitely see 30+ mpg highway out of a diesel explorer (even a 4bt), especially if I managed to break 20 with a 5.9 liter gasser in my Jeep.
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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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