The big one is improved driving technique. Many drivers experience poor fuel mileage due to poor driving technique. Having a vehicle appropriately geared is another one. If you're running in the 70s while running, for example, 3.70 rear end gears, then the RPMs the motor is turning will be very high, and the vehicle won't run efficiently.
Yes, 18 wheelers have 18 wheels.Some tractor trailers have more, some less.
i get about 18-24 in mine
The GMC Acadia has gas mileage of 18-24 mpg, which is fair for a vehicle of its size. However, this is lower than the average mileage for a gas-powered automobile.
18 city 24 Highway
I get 18 on the highway and 15 in the city
18 MPG.
The statistics are not broken down by that category (i.e.: 18-wheelers, 10-wheelers, 6-wheelers, etc.). They are all classified as "commercial" vehicles.
# no way.
Betwwen 13 and 18 mpg
15 to 18 mpg
18 in city 27 highway
Yes, by up to 18%