So yesterday I made my annual pilgrimage to cheyenne wyoming for fireworks and lots of em. The trip down is 185 miles on the interstate. Spent about 20 miles messin around in cheyenne befor i headed back. So my total trip was roughly 400 miles all together and without filling up once. by the time i got back home i was sitting at half a tank and my fuel consumtion was a little over eight gallons. If im doing my math correctly i did 50 Miles Per Gallon?!?!

 

Do you know your fuel consumption was only 8 gallons, or are you guessing by the gauge?

Because these cars like to take their time from F to 1/2 and go very fast from 1/2 to E. Many times my gauge looks halfway and it takes over 11 gallons.

 

Mines the same way now with the SS cluster, I would go fill the tank up and see how many gallons you really used

 

Blacksheep: Thats exactly what I thought. I was sitting just above half But i checked the gallons of fuel consumed thing on that one dealie with my sunroof controls n stuff (cant think of the name) And it matched up.
trewyn15: I just got back from fillin her up and she only took 9 Gallons.

 

I think mine is SLOW from F to 1/4 a tank, then the rest of the way the guage seems to have a steady pace.

 

same here, my gauge does nicely down to the 1/4 mark then it seems to move steady, i was riding in a friends ss and his trip gauge was malfunctioning at one time it said we were getting 99mpg at 68 mph lol

 

Check your injectors. You might be running lean.

 

lean enough to make him go 50 mpg? lol

 

the best i ever did with my 2003 ls was driving to Wichita (920miles) on 2 tanks of gas and that averaged about 32 mpg...i think that is pretty damn good

 

Really his stuff is all estimated. If he did do 400 miles with 9 gallons that's 44.4mpg