Sounds like a vaccume leak. IF the engine runs better at higher speed or you need to give it gas typical sign.
I am getting close to 10 - 11 miles to the gallon in a 1989 ford dually with a 460 fuel injected engine.
i am getting 26 MPG but with big tires and 75 on the freeway
Check engine light on, tires not inflated properly, driving habits,
14.7
The Ferrari 599 has a V 12 engine with 620 horsepower. It ranges between getting 12- 20 miles per gallon of gasoline depending on the driving conditions such as road or highway.
1 GALLON
$1170.
I have a 1.9 liter volkswagon engine in my 2001 beetle , 52 miles per gallon , 680 miles per 13 gallon tank , wonderful
The Suzuki GSXR gets about 40 miles per gallon depending on how you are driving it. Some studies show it getting 38 miles per gallon and some show it getting 43 miles per gallon.
If it's getting 60mpg then 60 miles for one gallon. The speed is irrelevant.
On average I get around 25 miles per gallon 3.5 engine
1 gallon max because it has a v4 engine