Your opinion

My apologies. I reacted and responded to the first post.
It is very frustrating when people ask questions and put 0 info out for you.

To answer your question the Mack looks to be the better truck in my opinion.
The e7 350 are great on fuel and last forever.

 

Shortwheelbase +spring ride = internal bleeding and pissing blood

 

That doesn't look bad for 15k, if it runs well out of the gate.

You'll need to fuel a couple times/week with the small tanks.

 

I'm not a big fan of Freightliner. They are a cheap truck IMO. Personally, I'd still go with the Mack.

All that being said, the main truck I drive is a '95 FL Classic. It's a ok truck but not Mack, KW, or Pete quality. I think the reason this truck is a decent truck is it's been babied since it was new.

 

About the whole fuel efficiency thing. It's absolutely the driver for most of it. I drove a RD Mack with an E7-350 and got 5 or so local. Another guy did the same with the same basic truck and he was getting 2. TWO!! He drove like a maniac and shifted at 2100 grabbing every gear even around the yard.

 

Add to the fuel efficiency....

I drive an 03 mack 600, e7 350, 566,000 miles. Pulling a tanker picking up farm milk 88,000 gross weight.

Stop lights, two lanes, big hills, idling and im still getting 5.1- 5.3mpg.