I’ll start:
1995 Jeep wrangler 10-12 MPG
2001 Hyundai Elantra 26 mpg
1994 GMC sierra 10 Mpg loaded
17 MPG if I’m a good boy 
10-12 mpg in my DD 02 Lightning with 93 octane
8-10 mpg in my 03 Cobra with Cam2 110 race gas
My foots full of lead… Lol
'04 Dodge Ram ST 1500 3.7L … between 22 and 25 MPG.
'06 Dodge Ram SLT 2500 CTD 5.9L … between 15 to 20 MPG, depending on how heavy the foot gets.
'08 Dodge Ram SLT 3500 CTD 6.7L … between 15 and 16 MPG.
2008 6.7L Cummins Megacab gets a whoppin 20+ mpg if im easy on her, its straight piped and chipped
2008 Ducati Hypermotard gets close to no MPG because its always being raced.
04 Avalanche - 9mpg?
07 Gsxr-50mpg
06 silverado 5.3 v8 93octane tuned- consistent 13.7mpg
1995 firebird-- to be determined…
2000 s10 v6 with triple alternators and 18’s. Lol 20 mpg
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9 mpg?! Why? Lol
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24 inch rims
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09 Sierra - 5.3L
12-13 mpg winter
16-17 mpg summer
dual alternators - 400# of stereo and horns lol
Are you running full deletes (EGR and DPF)? What kind of programmer?
Yeah everything is deleted with a Smarty Jr. on switch 2. Im really easy on my truck tho, usually no playin around for me, because it can land me in the 10-15mpg
I hear ya … I’m just waiting for my emissions crap to fail so I can have it warrantied.
Then I bring it home, delete it, and shelf my parts for when I need to get it smogged.
Kris
55 mpg
Think that’s a typo lol
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Did you mean 5.5 lol
ha ha!
Lmao maybe if I bought a moped! 
Using a Superchips Flashpaq right now since I was still in warranty up until a couple months ago. Added 114hp and am getting 10-14mpg, an increase over stock. Later this year I expect to go with a Spartan tune, full delete, cold air intake, maybe upgrade the twin turbos. Gonna add the +275rwhp and +310rwhp tunes (they have a +350rwhp tune also) to ensure tire smokage. Should increase mpg dramatically providing I keep my foot out of it…
Rolling down a 6% grade in neutral, maybe … LMFAO!!!