Mpg and dirt - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 14 (permalink) Old 09-17-2009, 03:33 AM Thread Starter
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Mpg and dirt

I know that planes are washed regularlly because the dirt causes drag and more fuel consumption. I wonder if a truck mpg is affected by its cleanliness?

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post #2 of 14 (permalink) Old 09-17-2009, 03:36 AM
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Re: Mpg and dirt

Ehh..i know it seems like they always run better after a wash..but guess it would depend on how clean you keep it under the hood. The cleaner it is..they cooler it will stay.

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post #3 of 14 (permalink) Old 09-17-2009, 03:47 AM
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Re: Mpg and dirt

i'd say so i drive 600 kms bi-weekly i noticed i always get better milage clean like a full 1/8 of a tank better at least! no actual proof thou

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post #4 of 14 (permalink) Old 09-17-2009, 11:37 PM
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Re: Mpg and dirt

Theoretically there would be a difference, I am not sure if it would be measurable.

Planes travel through the air much faster than most PowerStrokes (except mine, of course) so aerodynamics have more of an impact. Race cars fare the same, clean and waxed helps out with top speed and fuel economy and in a business where the difference between first and fourth can be less than a half second on a 500 mile race every bit helps.

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post #5 of 14 (permalink) Old 09-17-2009, 11:42 PM
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Re: Mpg and dirt

You should keep your truck clean regardless... Skimping on washes is just bad practice regardless.

On that note, I don't think it would be a noticable difference.
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post #6 of 14 (permalink) Old 09-17-2009, 11:46 PM
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Re: Mpg and dirt

If we're talking about drag here than I doubt theres a big differince in drag from a clean truck to a dirty one.
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post #7 of 14 (permalink) Old 09-18-2009, 12:23 AM
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Re: Mpg and dirt

well if you like to play in the mud and you have all sorts of mud and dirt caked up everywhere it might hurt your mpg some, but like said in other posts just being unclean, i doubt would make any measureable difference
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post #8 of 14 (permalink) Old 09-21-2009, 01:22 AM
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Re: Mpg and dirt

When I used to sell car washes my buddy and I would always push for a wax and claim better fuel mileage and a faster car


Yes, people would often buy into it.
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post #9 of 14 (permalink) Old 09-21-2009, 02:49 AM
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Re: Mpg and dirt

The only way I can see a clean truck get better mpg is if the dirty truck had around 2-300lbs of dirt on it,

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post #10 of 14 (permalink) Old 09-21-2009, 03:48 AM
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Re: Mpg and dirt

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Originally Posted by mazdaparts View Post
The only way I can see a clean truck get better mpg is if the dirty truck had around 2-300lbs of dirt on it,
Even at that, if 300lbs is affecting your MPG your truck needs serious help.


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