When it comes to vehicle mileage people are confused and often believe misconceptions .

Your vehicle is usually the second-most costly purchase you will make and automobile sellers lure customers with promises of fuel savings . But, is it best to pick a dinky little 'econo box ' to save the most gas? Would it be a good idea for you to utilize premium fuel when regular is called for? Would it be a good idea for you to dump in fuel added substances to expand economy or is that  a scam? To what extent would it be advisable for you to give a vehicle a chance to warm up or is it necessary at all? Would it be a good idea for you to replace an aging vehicle on the presumption it can't get as great of mpg as it did when new?

1. Is letting a vehicle warm up best for gas mileage?
Modern vehicles are intended to be driven within a few seconds of being started.  Letting the vehicle sit and warm up might be helpful in the winter to defrost and warm the inside, but this does not save gas. It is true that an engine must achieve an ideal working temperature for best efficiency? Automobile makers regularly suggest gradually taking off and giving the motor a chance to warm up as you are driving down the road. It will warm faster if you accelerate gradually.

2. Does a vehicle's fuel economy diminishes with age?
If your vehicle is 4-or 7-or even 10-years of age, is it less efficient? Would it be advisable for you to trade up to a newer model? Indeed, you may want to get a more efficient vehicle, however efficiency has not dropped from the original specs, providing it has been properly maintained. "Vehicles that are 10 or even 15 years of age will encounter little diminishing in fuel economy if properly maintained," says the EPA.

3. Does the government test fuel economy for all vehicles?

Most passenger vehicles and light-duty trucks are liable to testing, yet government law rules out testing for vehicles with gross vehicle weight rating of more than 8,500 pounds. This implies no official fuel economy rating is required for trucks  like the Ford F250/350, Dodge 2500/3500 and Chevrolet/GMC 2500/3500, vehicles. These surpass this weight constraint and are not tested.

4. Does it take more fuel to start a car engine than allowing it to idle?
No- The advent of stop-start technology ought to be proof enough this is a myth. In case you did not get the memo however, idling may use a quart to a half-gallon of fuel per hour. Therefore,  turn off the engine when sitting still, except when in traffic or waiting in line. New engines start very well and efficiently, especially when warmed. 

5. Does changing the air filter help fuel economy?
Actually it does not. Advanced fuel injected engines make up for messy air channels by diminishing fuel to the air-fuel blend. Once more, this is a leftover cliche from the times of carburetored motors that experienced diminished performance from grimy Air Filters.  Please note that changing a dirty air filter, while still for the most part suggested, is not a way to save fuel. It might enhance control for a more liberated breathing engine, as the fuel blend might be expanded too."

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