[mikesn9]

for stock 1.4:

Fuel range at current speed:
So, in: \Data\Cfg\Commands.cfg
Commands.cfg (open with a text editor like Notepad)

[Cmd257] <------------------ Step #1: Find "[Cmd257]"
Name=Report_time_to_turn
Ctxt=1
MnID=0x3F250002
Key0=0x47,s,"Shift+G" <--------- Step #2: Add this string

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If you also want the 'Weather Report' "Ctrl+W" make this [Cmd261] edit:

[Cmd261]
Name=Report_weather
Ctxt=1
MnID=0x3F250006
Key0=0x57,c,"Ctrl+W" <--------- Step #3: Add this string

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To remember "Shift+G" and "Ctrl+W" add them to your in-Game F1 Help file:
In: Data\Menu\Help\Help.cfg
Help.cfg (open with a text editor like Notepad, and find the 'OTHER CONTROLS' section:

[Chapter1.Phrase6]
Phrase=<b>OTHER CONTROLS</b>| NumPad - Decrease Time Compression| NumPad + Increase Time Compression| Backspace Pause|

------------------------------- Step #4: and add Ctrl+W & Shift+G:

[Chapter1.Phrase6]
Phrase=<b>OTHER CONTROLS</b>| Ctrl+W Weather Report| Shift+G Maximum range at current speed| NumPad - Decrease Time Compression| NumPad + Increase Time Compression| Backspace Pause|

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As always back up any files you edit in case you make a mistake