5.9 or 6.7 Cummins

[Fishmaster19]

The 6.7 has fuel system issues and turbo issues. I dont care what anyone tells you, there is not a truck on the road with stock tires or big tires programmer or no programmer delete or no delete that is gonna get over 20mpg! If it does then they must have put 20k under the hood...and where is the savings in that?! the 6.7 shoud get around 17 or 18 on highway and the 5.9 will get 22 at 60 to 65 mph. go to 70 and itll get down to 20 or below.

[Bucoo]

Originally Posted by Fishmaster19

The 6.7 has fuel system issues and turbo issues. I dont care what anyone tells you, there is not a truck on the road with stock tires or big tires programmer or no programmer delete or no delete that is gonna get over 20mpg! If it does then they must have put 20k under the hood...and where is the savings in that?! the 6.7 shoud get around 17 or 18 on highway and the 5.9 will get 22 at 60 to 65 mph. go to 70 and itll get down to 20 or below.

So you saying I'm lying? What makes you the expert?

[Fishmaster19]

Originally Posted by Bucoo

So you saying I'm lying? What makes you the expert?

My bad man I wasnt trying to offend anyone. But I have had a diesel and have many friends with them and a few of my friends are diesel mechanics so I am speaking from my own experience.

[Montauk17]

I witnesses first hand a 5.9 2500 4x4 crew cab long wheel base getting 25mpg with the cruise set on 70. Stock size tires and a edge programmer. I hear alot more issues with the 6.7. I found a 5.9 with 70k miles but it is in houston. Gunna keep looking or I may drive to houston it is super clean. Thanks for the info

[whunter29]

Originally Posted by Fishmaster19

The 6.7 has fuel system issues and turbo issues. I dont care what anyone tells you, there is not a truck on the road with stock tires or big tires programmer or no programmer delete or no delete that is gonna get over 20mpg! If it does then they must have put 20k under the hood...and where is the savings in that?! the 6.7 shoud get around 17 or 18 on highway and the 5.9 will get 22 at 60 to 65 mph. go to 70 and itll get down to 20 or below.

I have never had fuel system issues on my two 6.7s and all of the turbo issues that I have heard about were the direct result of the clean burn exhaust system malfunctioning. I can tell you this my dad has had both the 5.9 and the 6.7 and the 5.9 gets better mpg but doesn't have near the power of the 6.7 stock. Now when he put an H&S tuner on the 5.9 it helped it some but it still won't run with the stock 6.7.

[whunter29]

Also on the fuel mileage debate going on never trust the lying mpg on the truck because I can guarantee you are getting from 1-5 mpg less than its showing you and I have proven this fact to many people by simply calculating mpg the old school way.