Yes, relieves wind resistance.////you should not do this the tailgate could come off if not held down
No, it has been shown that driving with the tailgate down creates a sort of wind drag that actually decreases gas mileage. The article I read did not address driving with the tailgate off, however.
No; friction decreases gas mileage.
no riding with the tailagte down does not save gas. when driving, there is a circular swirl of air made when the tailgate is up and this makes the wind coming off the front of the truck bypass the bed and continue over the back. dropping the tailgate stops this affect and droppes the gas mileage.
Not only is gas mileage not improved by driving with the tailgate down or removed, it gets worse. Counter-intuitively, driving with the tailgate down increases the aerodynamic profile and wind resistance, degrading fuel economy. (Mythbusters recently debunked the myth. See link.) See the Related Link for "Mythbusters Episode #43" at the bottom left.
yes, a tonneau cove helps a little, it decreases the amount of wind drag on your tailgate, but so does taking the tailgate off or just putting it down if youre going on a long trip The previous answer given is technically incorrect. Usually tailgate down you increase the drag on a truck and will get worse mileage. A cover will actually improve you mileage a little but the weight of the cover may negate a portion of this. There are several studies cited online for this. Most places that talk about lowering the gate aren't basing it on science but on what they think is logical. Aerodynamics isn't about logic, it is a very complex science. Mythbusters actually tested this out, do a search on it.
Brands such as NGK, and Bosh both make plugs that are said to help gas mileage.
False
"Unfortunately, Liberty Toyota is a Toyota dealership, so I cannot help you answer that one. There is no gas mileage for this because it is not a car.."
By lowering the automobile's wind resistance to its forward motion
yes
You'll want to look for a performance air filter. Basically these increase gas mileage by increasing air supply. The more air which is available and circulating, the better the overall gas mileage.
There are many ways to improve your cars gas mileage. First check that you tires are properly inflated, change you oil and check and replace your air filters if necessary. In addition changing you driving habits will help to boost your fuel mileage.