My first maintenance issue

First, do you mean gas? or diesel? Two things I can think of but there could be more, are
1; cross over line valve between the tanks is closed.
2; vents in the tank that's full are plugged.

But it would probably help if you gave us more info on the type of truck?

 

Beat me to it... gas?

 

My buddy has the exact same truck and he's getting four more miles to the gallon than I am. I am getting right at 8 miles per gal (highway). Like to see your BUDDIES truck that gets 12 MPG also like to see a 2000 FRLR Highway tractor with MB engine in it , think they were introduced in 2003 in the CLASS 8 trucks.

 

What kind of truck? What are the truck specs? Diesel or gas? What kind of trailer? How heavy is the equipment? How heavy are the loads? What part of the country do you run in? Do you check the mileage using gallons burned divided by miles traveled or do you depend on what some gadget tells you?

 

ITS NOT A TRACTOR!!!! HELLO!!!!!


Come on guys READ his post, 2000 FL with Mercadies, 6 SPEED, GAS.


It's a straight truck!






American Trucker

 

HELLO

Freightliner had the 5ton VERSIONS ( straight truck ) with MB diesels in them in 2000 as well.

 

I agree but a little more information could validate this and lead to some insight for the OP.

 

Something can have been sucked up into your pick up pipe (suction pipe or what ever its called there) therefore it is drawing very little from that tank. Or as said, that tanks breather could be blocked.
Blow the pipes to make sure they are clear.