Ill go first with my current truck..
2005 ccsb 5.3
Mods- 3.73 gears with eaton limited slip posi, airaid cai, true dual flowmaster exhaust(mistake), and NP tune.
I know my truck runs a high 14 in cold weather and low 15 when it is hot... If my truck had a quill sticking out of it for every time my foot has been put in it; it would look like a porcipine lol and the 4l60e has lasted me 50000 miles and counting... Everything has.. knock on wood... Reliability 10