260kms in the SS and still half tank, not bad at all and also have had this tank in the car for 3 weeks now i should be able to go till this weekend in it, love the ls1 Mileage

 

My 97 Z with LT1 does about 300k on a tank pretty regularily. I do notice that I can get 200k+ on the first half tank and then less than 100k on the last half. I guess (pretty obviously) that the top half is much bigger than the bottom half. I was wondering if it is the same for the newer LS1's??

 

Once you hit halfway you better keep you eye on the gas gage! I once thought that I would get 500kms to a tank when I had 250kms and half left. Boy was I wrong.

 

ya i have heard that the top is heavy, how ever alll u gotta do is keep the foot outta her a lil and it wont be so bad i am aiming for 430iish i should be able to get it

 

what gear do you guys cruise in? say going between 60 and 70?

 

max I got out of my Trans AM when it was stock in city driving was 450kms to a tank after programming.

 

60 in 4th, 70 and up in 5th if im holding a constant speed, drop down to fourth if i wanna go a litle faster.

 

Our tanks are V-shaped....the first have is ok, but after that your done

 

65ish and above 5th and anything below that ill be in 4th

 

20 $ doesnt even get me half a tank and its gone in three days of just driving 10 - 12 min to and from work , not even 20 km each way. . . but Im usually mashing the gas atleast a couple times there and back

28.5 # injectors

 

Injector size will not affect your gas milage at all aslong as the PCM/ECM knows that you have that size injectors in there, it should be able to hold a constant A/F ratio without any trouble.

 

Yep, I am running 50lb injectors and neither my idle quality nor my mileage changed after the upgrade.

 

That doesn't sound like a good story...

Yeah, our gas gauges are definitely not 'consistent' between when they are in the top half compared to the bottom half.