There is a theory that the cold air is actually bad for fuel economy
It has to do with the idea of air density at different temperatures changing the energy loss from the compression of the intake charge.
Basically at low throttle settings you will get better economy if the intake air is hot
At high power settings you will get better power and economy with cold dense air from you cold air intake. So under heavy work conditions the cold air intake helps, puttering around with no load its going to be worse.
The ComputerThe computer will turn on the check engine light and set a code if it can't adjust to the change, so I discount this idea.It can decrease your mileage by 75%.
A catalytic converter's function is to filter most pollutants out of the exhaust so it probably wouldn't mess up the computer in the car or lower gas mileage. On an OBDII vehicle(post 1996) the computer watches the O2 sensors to monitor converter efficiency If the converter has failed(or is missing) the computer will adjust fuel ratios to try to compensate This can ruin economy,
No, it will decrease gas mileage.
Roof racks themselves have a negligible effect on gas mileage.
Yes
Posi?ætraction does not improve gas mileage nor does it decrease gas mileage. The traction does not come into play in less the pavement is wet.
On 6/23/08, the IRS increased mileage reimbursement for privately owned automobiles to 58.5 cents.
When performance and fuel mileage decrease.
No one can answer since it's illegal to roll back mileage.
I get about 32 average at 70 mph... gets better as you decrease speed. My computer registered 47 mpg at 55 mpg with A/C off. Thanks, Wes
computer. Usually that is. That way one cant just slap another odometer in a try to say that the car has less mileage on it.
high mileage rates