what is the best gas mileage you can get with a 3.8l,i can only get 17.8/ i put new plugs,wires, no codes showing up.i had a 97 tc with a 3.8 got 23 on the highway.thanks[]

 

My 2007 Town and Country has the 3.8liter engine. We average 24 mpg and recently got 28 mpg on a trip to the DC area from north GA. We lowered our average speed to 65 rather than 70 and I think it increased our mileage by about 10%.

 

I have 2001 AWD 3.8Land 17 MPG [].
anything today to make to go up to 28 mpg like my friend up there?

 

one rule of thumb u will never get better MPG then when it was new from factory if U alwase got 23 then that is what U will get from now untill it dies it can only go down. The only way u will get better is if u change your driving habbits.

 

21-22 mpgwith full load, 4-5 people, luggage and 2 surfboards, (major aero drag) @75-80mph. If I drop to 65 as high as 26-27 mpg.