Simple question or not

[Steve_H]

A girl who I go to Tae Kwon Do with asked me "why does the fuel gauge on my 172 have a "1" at the top of the gauge and an "R" at the bottom" - very simple question, but I didnt know why; do you?

 

[Final Maxim]

r = reserve 1 = full?

 

[Jay]

I guess 1=full tank and R=reserve/s

 

[Chris1.4RT]

Some say its for Refill but I personally think Reserve.

 

[Tom]

1= full tank

R= run out mate stop being a pikey and fill up