That depends on the car's make and size, but it's usually at least 100 miles.
how long can a car go on empty?
car manufacturers often quote a fuel efficiency in miles per gallon. for example, a car engine that is supposed to be 30 miles/gallon can go 3000 miles when the tank is full, which gives an average of 100mpg when it's full. a common misconception is that when you have run out, your speed will automatically decrease until the car stalls. in fact if you throttle down and coast with care your mileage may improve even though less gas is being consumed. when we think about our own personal driving we might not be constantly thinking about how hard we are pushing on the gas pedal and how far we've gone before taking a break but our cars often do automatically adjust for this reduction in performance because it's something they're
how far can a car go on empty tank?
about 10 miles
if a gasoline tank is completely empty, then a car can travel about 10 miles before needing to be refueled. if the only option was to push the car all of that distance, it could take hours. alternatively, there are numerous public transportation options around most cities to get from point a to point b without needing a working vehicle. in suburban areas where individual roads may not have bus stops or train stations, the best way to get from one location to another would likely require hitchhiking or walking down roadways.
how far can you drive after your gas light comes on?
it's like the gas light coming on. when it does you should stop for gasoline or plan to arrive at your destination with a full tank of gas.
trying to drive beyond the point when the gas light has come on will cause your engine to run poorly, may cause an abrupt stall that could be fatal, and puts an undue strain on other systems in your vehicle that would not be there otherwise. we recommend that you do not attempt it.
is it bad to let your car run on empty?
whether one should let a car go on to e depends on the context. if the car is in an urban setting and it will take less than 10 minutes to get to a fuel station, then it's probably not too much of a concern if you have no other option.
but in general it's better not to because there are actually some benefits that come from depleting your tank such as:
less gunk buildup accumulating within your engine–extended pump life at gas stations–reduced emissions (especially particulate matter) by providing clean air for pollution shields-smoother engine operation which saves fuel and prevents overheating and knocking because gasoline burns more efficiently with lower levels of oxygen enrichment.
therefore, we recommend you fill up