by Anonymous on January 18th, 2006
In 1982 the average was 4mpg.
Currently, in 2006 the average is 6mpg.
Sometimes, depending on the terrain traveled most frequently, eg; mountains or plains, mpg varies drastically.
The highest average I have witnessed is 9mpg.
The lowest I have witnesses is 1.75mpg.
A military tank with the same diesel engine can average 2 gallons per mile. That is not a typo.
by Davie on July 29th, 2007
a class 8 highway tractor will vary depending on it brand of engine. caterpillar averages 6.5 to 7.5 cummins averages 7 to 8 detroit averages 7 to 9 and mercedes benz engine averages 9 to 12. some of the mercedes engine have turbos the will spool up to 50 000 rpm. that amazing for a turbocharger of that size. hope his helps you... from David
by dieselfool on August 8th, 2006
With the new engines such as the Caterpillar Acert and the Cummins ISX, both over 450 hp, I would say an average of 5-6 mpg. But I've seen as good as 8 mpg and as poor as 4 mpg. It depends alot on idle time and terrain. A tractor that is pulling alot of mountain terrain and off road is likely to have lower mpg than that of a truck that is on level highway all the time.
by roket rider on April 27th, 2009
People are always so quick to brag 7 and 8 mpg. The reality is that if I gave you enough fuel to cross the US and figured your predicted mileage on 7 or 8 mpg, you would not even come close to making it there. If you have a perfectly still day, or a tailwind, and you also have an aerodynamic truck, and you also have a light load, and you also drive slow (60mph) with the cruise on, you will average about 6 to 6.5 if you are lucky. You may even touch 7 mpg if you are really gentle and coast some also. Fuel surcharges pay on 6.5 mpg, but the reality is that you cannot average that. The days when you fight the wind, or fight terrain, or you have a heavy load pushes your mileage down to the 5 mpg range, so you end up with an average for the year of high 5s or low 6s, many dollars below the surcharge.
Truth and reality which most people don't want to face because they look better if they yell out a high MPG figure, you will only average 5.75 for the whole year in a semi truck, unless you have a very careful driver that does not idle or anything else wasteful, which can allow you to average up to 6.5. I am ASE certified in Diesel and electronics for heavy trucks, and I look at a lot of ECM generated MPG, figures, the highest I have ever saw was over 7 with no trailer on a short trip. Usually they are high 5's to low 6's.
by Anonymous on December 2nd, 2008
An average per week of the 3 class 8 semi's I own, is anywhere from 6.3 to 7.6 depending on the route traveled. More mountainous the travel, the less fuel mileage you get. A good average for most trucks is 8 mpg.
by j-man on July 16th, 2007
The average mpg is 5-9 mpg. Less fuel would be burnt by train travel but it has its own implications as travel time from a to b.
by Anonymous on June 2nd, 2007
my hubby gets 7.6 in his 99 frightliner century
by freddy on May 28th, 2007
between 5,5 and 6,5 if you are smooth on the throttle
What kind of drive train does a steamroller have?
by Jeztyr - whispering in the ears of kings on December 13th, 2009
| 1 person likes this
I would like to know, when is the proper way to apply the Jake brake and the Johnson bar.
Thank you.
by rooster on November 23rd, 2009
| 1 person likes this
What would cause a 2003 dodge ram to sputter
by countrycoker on November 25th, 2009
| 2 people like this
I have a 95 freightliner fld with m11. Blinkers sometime quit. They will stay lite in the dash but don't blink. I can pull the breaker and put it back and they will work. Any suggestions?
by Anonymous on November 23rd, 2009
| 1 person likes this
On my bus, i had 4 x 6 volt batteries connected to make 24 volts. Now i changed the batteries to 4 x 12 volt batteries, how do i connect them together to make 24 volts.
by gnomey on November 25th, 2009
| 1 person likes this
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Comments
I get 4-5 mpg with my '87 White/Volvo Farm tractor/trailer. She's a Pig!
by rvp986 on February 16th, 2006
There has to be a better cheaper way to transport things . What if they ran on used cooking oil.What a saving that would be . Also less pollution.
by starman on September 15th, 2006
We get 6 to 7 mpg on our fleet of volvos, with volvo engines. How ever they are starting to run Bio-Diesel
by jjjjjjbbbbbb on October 17th, 2006