2006 Freightliner M2 poor MPG

Well, driving style can easily account for that much of a loss in mileage or more.

Going 55 instead of 65 could save a bundle in fuel expence over a year.

1000 miles at 8 mpg would be 125 gallon, and that times $4 a gallon is $500

1000 miles at 10 mpg would be 100 gallon, and that times $4 a gallon is $400

$100 per 1000 miles is nothing to sneeze about!


Over 100,000 miles that's $10,000 for only 2 mpg better for just going the speed limit or less and no tickets!!!!!!!!!

 

All depends on speed how heavy your are etc.8 mpg is close to where they get I hear worse before believe it or not.Might want to get it look at it can be a simple fix.

 

take some windex and spray all the connections on your intake fittings. If they are leaking, it should show as bubbles.

What's your tire pressure since winter hit?

winter fuel alone can cost you .7-.8 mpg

 

I had the valves adjusted on my 06 M2 and I got 10.8 mph after...

 

SLOW DOWN! Our sterling acterra gets over 10 mpg pulling 4 cars.. @55 mph, @70 mph it gets 4 mpg and @ 62 it gets 7-8 mpg.. you have to find the sweet spot.

 

As speed doubles, the power needed quadruples.

My 91 F250 7.3 got****

18 mpg @ 70 to 75 mph
20 mpg @ 60 to 65 mph
24 mpg @ 50 to 55 mph

 

Most of those rental type trucks were ordered under powered, what HP rating do you have, what do you weigh, it could just be that you are having to "push" the motor all the time, which will eat fuel, smaller motor doesn't ALWAYS mean better fuel mileage.