Looking for a some answers on MPG - Ford Powerstroke Diesel Forum

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post #1 of 8 Old 11-10-2010, 04:42 PM Thread Starter
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Looking for a some answers on MPG

I am looking to trade my 06 KR PSD 175000 mi, the miles are all mine. So fuel economy is very inportant, 90% of the miles I drive are non loaded miles. Which tire/gear ratio is the right option for the best economy? I like the looks of the 20's but are the 18's with 3.31's a better choice for MPG?
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post #2 of 8 Old 11-10-2010, 06:42 PM
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I have the 11 F350 4X4 DRW 3.73 and get around 16 MPG with the stock 17" tires. I get the same mpg as I got on my 05 Ram 3500 SRW. Ride is better though.
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post #3 of 8 Old 11-10-2010, 08:38 PM
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Quote:
Originally Posted by Supershooter View Post
I am looking to trade my 06 KR PSD 175000 mi, the miles are all mine. So fuel economy is very inportant, 90% of the miles I drive are non loaded miles. Which tire/gear ratio is the right option for the best economy? I like the looks of the 20's but are the 18's with 3.31's a better choice for MPG?
If you dont tow much and use the highway a lot i would get the 3:31 thats the highway gear.
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post #4 of 8 Old 11-10-2010, 08:43 PM
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Originally Posted by 91Terminator View Post
If you dont tow much and use the highway a lot i would get the 3:31 thats the highway gear.
Or if you like the look of 20" , go with 3.55

2011 F350 Lariat,6.7,3.55, crew cab, FX4, longbed w/custom Reese 5th wheel hitch,white,black leather,moon roof,navigation.

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post #5 of 8 Old 11-10-2010, 09:08 PM
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The shoot-outs say that with 1000# in the truck it gets better mileage... With that in mind, if I was to buy one for highway use I would get the 18" with 3.31's then upgrade to 20"

I like the look of 20's... and the bit the truck would work more might improve mileage (kinda like how the extra weight makes the mileage improve)

just my .02 cents tho

(I just bought the '11 with 20's and 3.55.. I havent gotten enough miles on them to truly comment, but so far if I baby the truck big time and drive at 100km/h I can get 21-22 mpg)
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post #6 of 8 Old 11-11-2010, 07:38 AM
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Well at about 9000 mi.....16 city and 22 hwy. Combine average of 17.9
Hoped that help

2011 F350 Lariat,6.7,3.55, crew cab, FX4, longbed w/custom Reese 5th wheel hitch,white,black leather,moon roof,navigation.

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post #7 of 8 Old 11-11-2010, 11:53 AM
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I'm at 3000 miles and estimate 15 city / 20 highway / 17 average (hand calc). 3.55 rear end and 20'' wheels.

2011 PSD KR
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post #8 of 8 Old 11-11-2010, 05:33 PM Thread Starter
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In my F350 I have an Edge Plat with 4 in exhaust and I avg 16 to 17 (hand Calc) with 20's. I am trying to figure out how much if there's an advantage and if there is how much is it... If the advantage is .1 or .2 mpg no big deal if its 1 or 2 mpg that's a big deal. So if you could note your set up and hand calc on mpg that would be great.
Thanks in adavnce Supershooter
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