FASTLLS
Dedicated LVC Member
Perhaps GM has spend more time tuning for sh1tty California gas as the farmers here often average 17-18 combined in the new 07+ silverados. and about 13 in the 04-08 fords and 16 with the 09+ f-150 with the 6 speeds.
Best I have had in my LS is 24.5 with average about 24. It's pretty consistent no matter how I drive it and yes I always use 91 gas. My 92' Town car would return about the same fuel economy but was rated for 26..
May be so.. I'm not going to argue on our experiences though.. I will say that I ran 93 and he was running 87..
The comment about the better fuel econ on a fi vehicle is common sense.. BB compared to a SB will get better fuel econ hands down.. Of course.. When driving down the hwy, your building a small amount of boost therefore not requiring as much fuel.. But a BB always requires that large amount of fuel.
I know you know all of this so there is no need to go in depth.. That's why I made the comment.. I understand that it is an awe factor to have a BB, but I would rather prefer the econ of a FI SB.. Imo of course..