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Old 07-05-2013, 11:46 AM
Gen1dak Gen1dak is offline
Dodge Ram Forum Senior Member
Join Date: Aug 2011
Location: MS Gulf Coast
Posts: 1,661
Gender: Male
Vehicle: 1990 RamCharger
Color: Red
Engine: 1988-1991 318ci (5.2L) LA V8 140hp
Rep Power: 4
Gen1dak will become famous soon enough

I'd chalk those initial numbers up to math and the transition to gears mid-tank. Just a couple gallons off. Can you guarantee you had the right amount? It's easy to mis-judge. Also, you have to consider what rpm the engine is operatiing at now as opposed to pre-swap. Not discounting some other issue, but considering what was just done, I mean, it is the 800lb gorilla in the room. For comparison, I have a '93 5.9 with 4.11's and the same size tires as yours, snags 15mpg......if my calculations are correct.
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