Better Fuel Mileage? - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 04-08-2007, 06:34 AM Thread Starter
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Sorry if I am asking this in the wrong place but you guys are talking about mileage and it got me thinking. My 01 7.3L F-250 with 6spd tranny and d.i.y intake and staight pipe 3.5" exhaust gets 16mpg empty and my buddies 99 same exact truck and mods gets 20mpg empty what could be wrong with mine to cause the lower mpg. Thanks for any help.
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post #2 of 8 Old 04-08-2007, 06:59 AM
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maybe u have a heavier right foot


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post #3 of 8 Old 04-08-2007, 07:13 AM Thread Starter
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that may be the problem but I have to drive it nice to see if that was the problem and the mpg didn't change much at all in fact I think the 16 mpg was when I drove nice. But man is it hard not to get on the throttle in these trucks it just sounds so dang nice and what a feel.
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post #4 of 8 Old 04-08-2007, 07:23 AM
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Originally Posted by 01clj View Post
But man is it hard not to get on the throttle in these trucks it just sounds so dang nice and what a feel.
Buddy I'm with ya on that one.

I would start a thread over in the 7.3 section, I bet you'll get some great answers. Heck I gave up on fuel economy a long time ago. I'd be doing so good keeping my foot out of it.....and then another truck pulls beside me at a light and it's all over.

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post #5 of 8 Old 04-08-2007, 07:30 AM Thread Starter
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No I'm serious about the buddy with the same truck we bought them from the company he works for when the company was trading them in on new ones. Bought them for trade in value what a deal. He got his a year before me and his is a 99 and mine is an 01 nearly identical trucks just 2 yrs difference and his gets 20 mpg nearly all the time and I haw seen as low as 12mpg. I will try a thread in the 7.3L forum.
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post #6 of 8 Old 04-08-2007, 10:10 AM
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Hey 01clj I moved your topic and its responses so maybe you'll get more answers!

I have 2 things to say... maybe he has an "early" 99 with smaller turbo and smaller injectors that doesn't have has much hp as your truck. The 2nd thing is how are you 2 calculating your mileage? If he's following the overhead display and you are hand calculating chances are he is wrong.

BTW, 16mpg isn't bad in these trucks for daily driving. I get about 15, but I've got a heavy lead foot on ULTRA LOW SULFUR diesel AND winter blend... I'm happy...

Last summer before the ULSD during the summer blend fuel I got almost 18!

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post #7 of 8 Old 04-08-2007, 11:51 AM
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Yeah I agree 16 aint bad! I have been getting 16 this winter and I have got as high as 19 so if you going for mileage keep the rpms under 2000 and see what the next couple of tanks gets ya. Its almost impossible to drive sensible in these big rigs with all the power at your mercy

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post #8 of 8 Old 04-08-2007, 07:16 PM Thread Starter
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Yeah he does have an early 99 and I did'nt know that his had smaller turbo and injectors that would most likely explain the better mileage because he too has a heavy right foot like me.
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