Managed to squeeze 31 mpg and 514 miles out of 16.6 gallons of fuel in my 1999 Buick LeSabre, with the 3.8l 3800 Series II V6. For this it got a tuneup. :bananajump: Most of this was highway doing about 60, yet 20% was purely in-town, stoplight-to-stoplight driving. What a great highway engine. Too bad GM killed it in favor of more complex, less-efficient designs. Sometimes you really can't improve upon a classic.