It isn't. However, if you have an older vehicle, which can allow fuel to spill out, and this does happen, you'll be liable to be cited and fined for that, especially as fuel oils (and especially unleaded fuel and hydraulic oil) will break down asphalt.
Verify that the cap is tight. Drive for a couple of days, and if the light is still on, you have a vapor leak in the fuel system and will need service.Verify that the cap is tight. Drive for a couple of days, and if the light is still on, you have a vapor leak in the fuel system and will need service.
You probably mean a valve cap. The cap keeps the valve free of dirt, so it's not the best way to do it but it's possible to drive a car without protecting the tire valve.
No, cap guns are not illegal in Chicago.
Cap guns are illegal in Rhode Island.
don't try it. i drove 20 miles without one and my head gasket blew. its a pressurized system and without the cap, there's no pressure. not a good thing.
On a 2008 Ford Explorer you can have a fuel cap or the EASY FUEL system that doesn't have a fuel cap
If air valve in cap is blocked, then no air can enter the tank as fuel is used. This causes a vacuum and stops fuel from pumping. Remove cap when motor is warm tank is only half full and drive for about 5Klm. If it doesn't stall then replace your fuel cap with a new one. If it still stalls then something else is the problem.
Yes, it is possible but not recomended.
Not for very long, the coolant will splash out to a point where it will overheat.
Your question is confusing. Petrol will evaporate if that is what you are asking. Also running around without a fuel cap will cause the Check Engine light to come on and the emissions system to not work properly. You may also get debris in the fuel tank.
As of July 2014, the market cap for Rocket Fuel Inc. (FUEL) is $854,306,979.24.
Start with replacing the fuel cap, then drive it for a while to see if the light goes off.