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1976 dodge adventurer w200 powerwagon sport
extended cab, 440 w/edelbrock intake and massive carb, w/air conditioning, 3/4 ton with 1 ton running gear, rv cam..........big yellow scary ugly rusty truck to normal folks, but beautiful to me.
so anyway, i/ve had this truck for a few months now and i have never driven it more than a few miles at a time. tonight i decided to mud up the rust a little and went searchin' for Larch Mountain. i filled up and calculated i got 4 mpg, and decided to fill my plastic cans. i drove all around looking for the mountain but missed it and ended up 2 counties over. i did the math and figured i went 42 miles. i was afraid the pump would never end but i had to force the last 1/4 gallon to fill it at 3 gallons. that's 14 mpg!!!!!!
fourteen miles per gallon.
as the truck got warmer the throaty growl got smoother and warmer. on the freeway it just hummed all the way back, besides the single snorkle whistlin' after 55mph and the whine of the a/c belt after 60mph. does this sound possible? it's totally what happened tonight and i am so excited, if it keeps up, it will get better mileage than my commuter car!!! if only i could navigate a parking lot without killing curbs and shaving rear ends.
-mm-
 

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today i took my 89 rc 318 for a 2 hour cruise all around the everett/lynnwood area. had the trip odometer at 0 starting. had a 1/4 tank. put in 2.5 gallons and then did the 40 miles of cruising. when i got home i had a lil over a 1/4. so i figure i used maybe 2 of those gallons. that means i got like 20 mpg today! HOLY HELL DUDE! thats insane on an old dodge. but between my gearing and the tbi setup i guess its possible.
 

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I use to drive 750 miles per week and filled up my tank at all different stages. I noticed you get the most consistant fuel mileage if you run the tank down. The first 1/4 of tank can be pretty inaccurate because of how the vehicle may be sitting while your filling and how much you fill up the neck of the tank. For both of you, you need to run the tank down more to get the true mpg. Probably wont be so excited then. My 82 Dodge Mirada with a 318 got 42 mpg one time on a 90 mile trip. Well in reality the car at the time only got 24 mpg on the highway.
 

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wow wish my rc would get 14 mph........seems to be stuck on around 8ish....even if i keep my foot into it or not!
 

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My '85 RC with a transplanted (sick) 360 got 10-12 MPG around town. Really that isn't bad considering my compression was way low because the Summit kit had the wrong pistons in it. I decided to do something different so I am transplanting a late model MAGNUM 360 into it. This is without the EFI so I can run a Thermoquad carb. I should see 15 MPG plus on the highway when things are dialed in. Everyone tells me I am dreaming. We shall see. :)
 

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You should be dreaming. I have a magnum 360 in my RC with a 600 cfm holley and the most I ever got out of it was 13 mpg and that was with the wind at my back. ;D
 
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