My guess is no. However it could be dangerous as gas could spill out on turns and possibly combust if it were sparked or came in contact with a hot exhaust pipe. Yes. The fuel system is operating in a positive pressure dynamic. Not having your gas cap secured, does not allow the fuel pump to fully pressurize the system, thusly NOT ALLOWING THE SYSTEM TO WORK AT DESIGNED EFFECIENCY.
Rough and poor fuel economy.
Fuel economy that is achieved in primarily city driving
Hard starting, loss of power, poor fuel economy, and you will fail any emissions test.
No. Fuel economy is influenced by many factors such as driving conditions, driving habits and of course vehicle condition. It is impossible for one set of estimates to predict fuel economy precisely for all drivers in all environments. (From motoroilmatters.org)
That will depend greatly on the fuel economy of the vehicle you are taking.That will depend greatly on the fuel economy of the vehicle you are taking.
It depends upon the fuel economy of the vehicle you are driving.
No, it could actually decrease fuel economy by decreasing the oil viscosity.
A larger displacement engine uses more fuel.
yes
The new Ford Focus equipped with the Super Fuel Economy (SFE) Package combines sporty driving and fuel efficiency with a 40-mpg hwy fuel economy rating.
Idle less, accelerate and drive slower
Fuel economy is decreased by underinflated tires as well as the tire life is decreased. So you could probably see a savings of 5-10% in some cases @ 35 psi on fuel economy and save yourself the price of a set of 4 tires. Fuel economy is also affected by your driving style. Speeding, fast starts/fast stops and general nasty driving habits will kill your fuel economy really fast. Slower & steady with easier take offs from the stops will increase fuel economy.