lets see the best milage cars,how many miles do you get to a tank and big is your tank?

 

how about lets see who gets the worst!

I WIN!

 

I have a 16 gallon tank, I just replaced everything that needs to be replaced to improve my gas mileage so I am hoping for 35 to 40 MPG, ( I was getting close to that a few months ago) I will let you know in a few days.
Lawrence

 

16-19 mpg highway on my cc-2bbl verajet carb and about 170 ish miles before i fill up, i have about a 15 or 16 gallon tank (stock berly tank)i also got 3.08 gears, and its an auto

 

I have gotten 25 mpg highway with my tuned LG4 with 700R4 and 3.23 gears.

 

stock 305 tbi auto 27 mpg all day long.

 

~16 MPG Highway, but that's with me going 90MPH+ everywhere on a 305TBI.

 

why is there such a diffrence between one 305 and another.

some claim 27mpg others claim 16mpg. how could there be a 10mpg diffrence between essentialy the same car?

 

State of tune plays a huge part. TPI & MPFI are much more accurate in metering fuel whereas TBI just sprays into the throttle bores and hopes it all makes it into the cylinders. Because of this, the TBI intakes are wetted down with fuel which doesn't do much because it needs to be a vapor. Having a dry plenum makes things easier to predict & control overall.

 

150 miles/tank

 

Crikey, man!...but that thing looks like it really performs.

 

yes but both of them ARE tbi.

how could there be such a diffrence in gas milage?

unless someone isnt doing there math right. but if they are then something is making one get horrible milage or something is making one get incredible milage.althou im pretty sure 27mpg for a v8 cant be that common.

 

Every single vette and f-bod over the last 10 years has been rated at 28mpg on the highway. I used to get 32mpg in my T5 305 TBI back when it was stock. In addtion I used to get 29mpg in my 95 M6 LT1 car as well.

State of tune and condition of the motor play important roles in fuel mileage. Road condition, altitude and tires also play a huge roll.

Some people have a horribly flawed concept of how TBI works.

There really is no need to hash this out. A few searches will uncover many old threads. The most recent that comes to mind is "TPI vs TBI fuel economy" in the TPI board.

 

well on about 15 gallons with average driving conditions (mix of everything, WOT, hwy, street, cruise) i go about 230 miles

 

Not a F-body but I can relate to a TBI getting awesome mileage. My fullsize van with a TBI 312(.040 over 305), 700r4, and 3.08 gears got 23 MPG with the A/C on and the cruise set at 75 on a long highway trip. With a 34 gallon tank that means that a range of close to 800 miles is possible. With a L82 cam, 272 RWHP, and 3.73s I can still get 20 MPG on the highway doing 70. That means I can still do 680 miles between fillups. I get about 15-16 in town with a slightly heavy foot but I can still get 500 miles to a tank.Details
Edit-when my brother and I went to retrieve the 74 corvette he bought out in Arizona I got 16.77 mpg with the vette in tow on a 20' tandem axle trailer. With just the trailer in tow it still got about 18 and going West from Texas went easy. 2,800 in 3rd doing 60 up a mountain. On flat land where I could maintain TCC lockup, I just let it shift into OD and drop to 2,200. Really an uneventful trip.

 

I get 21 to 22 MPG mixed driving(hgwy/city/abusive) in my 92 350 TPI T5.

I get roughly the same in the 87 IVERT 305 TPI T5.

Highway in the 92 seems to jump to 25 to 26 MPG.

 

I get 23-25 mpg...all highway miles. 93 Octane....or at least the pump says it is