hood visor affect mpg

[babb]

Installed hood visor last week and dropped 2 mpg this week is this possible? Went from 22 to 20............05 silverado w/t 4.3 5sp

[MS3DALE]

I've never had that problem and I've put hood deflectors on every truck I've owned.

Of course I put them on as soon as I get the truck (Usually before the truck even leaves the lot,since I work at the dealership) so I've never checked the mileage without one.But man two MPG difference just dosen't sound right,I can't see that happening just because of a hood deflector,although I guess it could be possible.

I was always told that sunvisors cut your mileage down,but again,I've put one on every truck I've owned and never saw a difference at all,And I did get chances to check the before and after mileage on that installation and saw no difference.

[robot225]

i didn't have that problem w/ mine

[Rammer]

I'm sure that anytime you change the areodynamics, especially the frontal area, you will have a difference in fuel economy. It might not be enough to notice, but it will change.

[dewfpo]

Installed hood visor last week and dropped 2 mpg this week is this possible?  Went from 22 to 20............05 silverado w/t 4.3 5sp

 

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When you say 'hood visor', you're talking about the air deflector you installed at the leading edge of the hood right? not a visor you added to the leading edge of your cab roof right?

 

DEWFPO

[95Sierra2500]

If he's referring to the visor on top of the cab roof, then it's quite possible that he lost that much MPG. But if it's just a bug guard on the front of the hood, then something else changed.

[babb]

Installed hood visor last week and dropped 2 mpg this week is this possible?  Went from 22 to 20............05 silverado w/t 4.3 5sp

 

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Sorry for the por description, might have had a few cold ones before posting, any way added a bed cover and exhaust and todays fill up was around 24 mpg, must of been driving conditions