How much does aditional weight affect MPG

So...given you "experience" the guys in the PNW a getting -25 mpg>>>Great theory you have!

 

Well, that experience appears better than the college educated idiots I know that work for a major "Blue" carrier.

Weight, incline, route, weather have ZERO impact on mileage, is what they were taught in their college. And they tell their drivers that too.

 

I'm not following your math. How did you arrive at -25 mpg?

 

Hey now, that doesn't describe all college edujumacated folks in the industry. That's just a lack of common sense that the majority of the general population seems to lack, or pure ignorance.

 

Oh no, I didn't mean to imply that on everyone who was college educated.

But, anyone who believes that the afore mentioned scenarios have zero impact on fuel economy.....isn't educated at all.

Engineers to often try to apply the math to meet the company projections/expectations.

Just look at the climate scandal. Fools inserted flawed data, to protect their jobs/grants. The data was false, pure and simple. But they knowingly pounded us over the head with it, in the daily news.

 

You "profess" that an additional 1,000 lbs in gross weight costs you 1 mpg. So when you go from 80,000 lbs to 81,000 lbs you lose 1 mpg. Given that they run 105,000 lbs gross weight in the PNW (chich is 25,000lbs over 80,000 lbs) useing your theory they should be running @ negative 25 mpg.

 

Originally Posted by Frenzy
My rule of thumb is that adding 1000 lbs will drop the mpg by .1.

You missed my decimal point.

I will rewrite the statement for better clarity.
My rule of thumb is that adding 1000 lbs will cause a 0.1 drop in mpg.

I do mostly light (10K) loads with the expectation that I can get 10 mpg pulling an empty trailer. So with a 10k load I expect to get around 9, 20k around 8.

 

Yep, I did miss your decimal point OR I ignored it thinking it was a speck of dirt/dust on my screen>my apologies

So, useing your theory, if you load 45,000 lbs it costs you 0.35 mpg vs hauling a 10,000 lb load.

 

I think you meant 3.5 mpg.

So by using my rule of thumb, I would use (10 - 4.5) 5.5 mpg as a planning number for a 45K load. That would be my worst case mpg, I would very disappointed if I actually got that low of a mpg.