Quote:
Originally Posted by robertway
Re-quoting for the purposes of establishing a documentary... or something like that. anyway....
Riddle me this Batman... after all of the above, I ran the tank of 91 and some smaller percentage of 87 all the way down, I mean all the way down, rolled into the gas station after having been "low fuel range" for about 40-45 miles before rolling in to fill up. I filled up with 93, lucky enough to have a station right outside the neighborhood with 93. She took 17.56 gallons so there was just one gallon of fuel that over the past couple weeks is roughly one part 87 and two parts 91 (tank of 87 from dealer and two tanks of 91 from me). After the 17.56 gallons of 93 I would venture to say I have a full tank of 92.6 at worst 
Pulled the fuses last night and left them out until I was heading out for work this morning, left early enough for NO traffic on my 90+ mile interstate commute and intended to light-foot it all the way to work cruising at about 70-75mph to try and maximize MPG. The result..... 21mpg.. WTF!!!!!!!! That's not even close to the 24mpg the friggin car is rated at. When I say I light-footed it, I even took my foot totally off the gas going down all the huge hills on the interstate. This leads me to one final attempt and that is to not only pull the fuses again tonight but also disconnect the battery, I may even pull a couple wheels off the car if it will help as well as sleep with my boxers on inside out (what effect that has I have no idea but my kids wear their jammies inside out to try to get it to snow and it friggin works every time...)
I am thinking there is more truth to the title of the thread where is says LS3's needs a battery disconnect. I'll try again tonight and report back once again. As an aside, am I trying to draw blood from a stone here, is 22mpg cruising on the interstate what is to be expected when GM specs rate it at 24, I have seen folks reporting over 25 and in some cases 27-28mpg but I am wondering of that is for the L99 and the cylinders shutting down a lot.
Yes I know I bought a V8 and shouldn't care about mileage and for the most part don't but want to make sure the car is using the high octane table so when I am shooting for 8mpg on the back roads I am getting the most bang for my buck |
Yesterday afternoon did the light foot test on the way home and managed a little over 24mpg for the 90+ mile interstate portion of trip in the 70-75 range, this was after only getting 21mpg on the way in so I don't know if it was headwind on the way in, tailwind on the way home, aliens, placebo, take your pick
Last night just decided to unplug everything, pulled 5 and 20 and disconnected the battery and lit it sit overnight. This morning on the ride it took my opportunities to drop off the interstate and and use the on ramp to see how she kicked and all I can say is something woke this car up because she was breaking loose in first even before hitting WOT and I have 315's in the rear. Now temps are quite cold here in Jersey at the moment so I am sure that helps with the tires breaking loose but earlier this week she wasn't breaking loose even at WOT. The herky jerkies are pretty much gone except for those induced by my getting used to the clutch. Definitely feels more responsive at partial throttle. On the way home I'll light foot it all the way and see what kind of mpg I can pull. Either way, I think at least I am back on the high octane table which is all I was concerned about.