After driving the truck 1200 miles back to Montana I can say on the highway the 4.3 is a dog! Haha the 5 speed makes it better though. Cruising is fine but passing is SLOW. But hand calculated at 75 mph averaged 17 mpg compared to my dodges 14- 15. And I can do about 430 miles per tank compared to the dodges 310. I am more than satisfied with the little v6 paired with the standard.