you do realize that the 4cyl and 6cyl truck don’t have a huge mpg difference ?! my 2000 s-10 4 bannger 5 speed averaged 22mpg and my 1996 sonoma 4.3 auto averaged 19mpg … and a v6 actual moves the truck, if u can’t afford a 3mpg difference good luck shopping ! oh yah and my 97 vette averages 21 so there yah go engine size doesn’t directly equate to good/bad gas milage