What mph gives the best MPG?

7. The Energy Saving Trust says that the most efficient speed you can travel in a car in terms of achieving the best fuel economy is 55-65mph. Any faster, though, and the fuel efficiency decreases rapidly.

Why is 55 mph the most efficient speed?

So, why 55? Well, it has to do with wind resistance, actually. It turns out that when it comes to wind resistance, at 30 mph wind resistance is four times as great compared to when a car is going 30 mph.

Is 70 mph fuel efficient?

The average fuel economy decrease from 50 to 60 mph was 12.4%; from 60 to 70 mph the average decrease was an additional 14%; and from 70 to 80 mph the average decrease was another 15.4%. The best fuel economy is typically obtained when the vehicle is traveling at the lowest speed in the vehicle's highest gear.

Is 55 mph the most fuel efficient?

Midsize conventional gasoline cars achieve their best fuel economy at 55 mph. The fuel economy of midsize conventional diesel cars declines gradually from 45 to 55 mph and then drops quickly thereafter. The midsize hybrid electric vehicle loses efficiency more evenly between 45 and 75 mph.

What is the mpg for 55 mph vs 70 mph?

What is the mpg for 55 mph vs 70 mph? 55 mph --> 53 mpg. 70 mph --> 37 mpg.

The Most Efficient Driving Speed - An MPG Experiment

What car can get 100 mpg?

The BMW i3 can be had with an available tiny range-extending gasoline engine, making it either an all-electric vehicle or plug-in hybrid. As a plug-in, it has an EPA-estimated 100 mpg-e rating.

What is the best speed to drive to save petrol?

Most cars, vans, pickup trucks and SUVs are most fuel-efficient when they're travelling between 50 and 80 km per hour.

Is 95 more fuel efficient than 91?

The general rule of thumb is: the difference in fuel efficiency is about 1% per octane rating – 91 and 95 unleaded fuels, for example, have roughly a 4% difference.

Does going 65 save gas?

You can improve your gas mileage 10 – 15% by driving at 55mph rather than 65mph (104km/h). Natural Resources Canada puts the “sweet spot” for most cars, trucks, and SUVs even lower, between 30 mph (50 km/h) and 50 mph (80 km/h).

Is any engine 100% efficient?

Assertion :Efficiency of a heat engine can't be greater than efficiency of Carnot's engine. Reason: Efficiency of any engine is never 100%.

Is fuel economy better at 60 or 80 mph?

Fuel economy for a light-duty vehicle going 80 miles per hour (mph) is about 27% lower than when traveling at 60 mph. Between 40 and 50 mph is the optimum cruising speed for the best fuel economy in cars and light trucks, according to an Oak Ridge National Laboratory study of 74 different vehicles.

Does driving 60mph save fuel?

“We found that limiting your maximum speed to 60 MPH reduces your fuel consumption by 10%,” said Simon East, CEO of DriveGain, “but that this only adds 2 minutes to the average journey time”. “We find drivers tend to over-estimate how much quicker they will arrive when driving faster”, he added.

Do slower speeds save gas?

Slow Down and Drive Conservatively

Reducing your speed by 5 to 10 mph can improve fuel economy by 7%–14%. Using cruise control on the highway can help drivers maintain a constant speed; vehicles use the most energy when accelerating.

Does driving at 55 mph save gas?

Cars use 50% of their energy overcoming aerodynamic drag. Reducing highway speed to 55 mph or less can improve fuel economy between six to eight miles per gallon.

Does driving fast burn more engine oil?

Driving fast, especially in a sports car, can burn gas more quickly. And while the result isn't as drastic, driving fast burns oil as well. However, this is typically only true at high RPMs, and the burning of oil is negligible unless you have other engine issues.

Does AC burn gas?

As a general answer, a Consumer Reports study found that, yes, running the AC does reduce gas mileage. Here are some tips to help you balance your fuel consumption with comfort. Generally, the air conditioner uses gas, so use it wisely.

What wastes more gas windows or AC?

Air conditioning on both vehicles reduced the miles per gallon more than running with the windows open. The TV show Mythbusters ran an experiment with two identical SUVs on a test track, and the SUV with the windows down traveled 15 miles more before running out of gas at 45 miles per hour.

Why are older cars better on gas?

That's mainly because they were lighter and their engines were tuned to generate far less horsepower than modern cars.

Is it OK to mix 95 and 98 petrol?

Mixing the 95 and 98 octane fuels will not cause any problems.

Is it OK to mix 91 and 95 petrol?

Yes, drivers can mix the two types of fuel. The combined gas types will result in an octane level somewhere in the middle — something the vehicle “will survive,” according to The Drive.

Do you get better mpg with higher octane fuel?

Premium gas is also often referred to as high-octane gas, thanks to an octane rating of 91 to 94. Regular gas typically has an 87-octane rating, and the 88-90 range is considered midgrade. While premium gas drives performance in certain engines, the idea that it's more fuel efficient is a myth.

How do I maximize my mpg?

Why do European cars get better mpg?

Better Fuel Efficiency

American cars simply are not as fuel-efficient as European vehicles. European vehicles are built with European gas prices in mind, which are substantially higher than American gas costs. As a result, European cars let drivers get more out of each gallon.

What car has the highest mpg ever?

What is the lowest mpg car?