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7.2 mpg hand calculated!!!

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  #11  
Old 01-25-2009, 01:21 PM
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Originally Posted by 04 HEMI 04
but anyway, i always fill up at between 16 to 18 gallons of tank. When i filled up the tank the starting odometer reading was 64897 miles, then after 5 days or so i dont remember the last odometer reading was 65018 miles, for that i subtracted that number from 64,897 miles which came out 121 miles. i divided 121 by 16.9 gallons i filled the last time which came out to be 7.2 mpg.
Why are you dividing by 16.9? Is that the amount of gas you put in the tank to fill it back up after you drove the 121 miles? Was the tank full when you started the 121 mile run?
 
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  #12  
Old 01-25-2009, 01:32 PM
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There is no such thing as an anti siphon tank..lol
 
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  #13  
Old 01-25-2009, 01:50 PM
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Originally Posted by dodgeorgethit
There is no such thing as an anti siphon tank..lol

This is what I found on a quick search http://www.freepatentsonline.com/4343410.html

If a car doesn't have the siphon neck, then it will have a screen to block any hoses being run into the tank
 
Last edited by dirtydog; 01-25-2009 at 01:53 PM.
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  #14  
Old 01-25-2009, 02:08 PM
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oh i forgot to say i always fill up the tank when it is at 1/4 gas in it
 
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Old 01-25-2009, 02:11 PM
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maybe my front bumper is damaged so it adds more drag to the truck????? ill show you pictures of bumpers later
 
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  #16  
Old 01-25-2009, 02:21 PM
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04 hemi 04
After you drove the 121 miles how many gallons did you put in? That is the number you divide into the miles not the 16.9 gallons you put in the previous time!
 
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  #17  
Old 01-25-2009, 02:35 PM
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Also -- gotta fill it absolutely full, not to pump cut-off. Long-term, this is not good for the truck, but it's the only way to accurately determine the mileage. How 'bout tire sizes, are they stock?
 
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  #18  
Old 01-25-2009, 02:52 PM
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Do you let it idle and warm up for awhile? That along with winter blends of fuel can drop mileage considerably.
 
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  #19  
Old 01-25-2009, 02:59 PM
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yeah i think you'r doing your math wrong.......you take the miles you drove on your previous tank and then divide that ny the amount of gallons of gas you just put in
 
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  #20  
Old 01-25-2009, 03:18 PM
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Originally Posted by lxman1
Do you let it idle and warm up for awhile? That along with winter blends of fuel can drop mileage considerably.
Thats for sure, since its gotten cold and i put my cai on my milage has dropped and i cant get back up to where it was. just have to wait for the spring.
 
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